Comprehensive Survey Doctrines Catalog

A complete reference of legal doctrines relevant to land surveying, boundary law, and property rights. Each entry includes a definition, authoritative citation with direct source quote, exam relevance, and cross-references to related doctrines.

Quick Reference Summary#

#	Doctrine	Category	CA PLS	PS	FS
1	Follow the Footsteps	Boundary	Yes	Yes	No
2	Original vs. Retracement Survey	Boundary	Yes	Yes	Yes
3	Monuments Control	Boundary	Yes	Yes	Yes
4	Hierarchy of Calls	Boundary	Yes	Yes	Yes
5	Four Corners Doctrine	Boundary	Yes	Yes	No
6	Construction Against the Grantor	Boundary	Yes	Yes	No
7	Boundary by Agreement	Boundary	Yes	Yes	No
8	Boundary by Acquiescence	Boundary	Yes	Yes	No
9	Practical Location	Boundary	Yes	Yes	No
10	Boundary by Estoppel	Boundary	Yes	Yes	No
11	Adverse Possession	Boundary	Yes	Yes	No
12	Prescriptive Easements	Boundary	Yes	Yes	No
13	Accretion	Water	Yes	Yes	No
14	Reliction	Water	Yes	Yes	No
15	Avulsion	Water	Yes	Yes	No
16	Riparian Rights	Water	Yes	Yes	No
17	Littoral Rights	Water	Yes	Yes	No
18	Ordinary High Water Mark	Water	Yes	Yes	No
19	Thalweg Doctrine	Water	Yes	Yes	No
20	Meander Lines	Water	Yes	Yes	Yes
21	Ambulatory Boundaries	Water	Yes	Yes	No
22	Public Trust Doctrine	Water	Yes	Yes	No
23	Parol Evidence Rule	Evidence	Yes	Yes	No
24	Patent vs. Latent Ambiguity	Evidence	Yes	Yes	No
25	Extrinsic vs. Intrinsic Evidence	Evidence	Yes	Yes	No
26	General vs. Specific Intent	Evidence	Yes	Yes	No
27	Construction vs. Interpretation	Evidence	Yes	Yes	No
28	Statute of Frauds	Evidence	Yes	Yes	No
29	Senior/Junior Rights	Conveyance	Yes	Yes	No
30	Strip and Gore	Conveyance	Yes	Yes	No
31	Bona Fide Purchaser	Conveyance	Yes	Yes	No
32	After-Acquired Title (Estoppel by Deed)	Conveyance	Yes	Yes	No
33	Doctrine of Merger	Conveyance	Yes	Yes	No
34	Doctrine of Relation Back	Conveyance	Yes	Moderate	No
35	Deed Reformation	Conveyance	Yes	Yes	No
36	Privity	Conveyance	Yes	Yes	No
37	Color of Title	Conveyance	Yes	Yes	No
38	Claim of Right	Conveyance	Yes	Yes	No
39	Tacking	Conveyance	Yes	Yes	No
40	Fixture Doctrine	Conveyance	Moderate	Yes	Low
41	Quiet Title Action	Conveyance	Yes	Yes	No
42	Remnant/Remainder Parcel	Conveyance	Yes	Yes	No
43	Doctrine of Worthier Title	Conveyance	Low	Low	No
44	Rule Against Perpetuities	Conveyance	Low	Low	No
45	Constructive Notice	Recording	Yes	Yes	No
46	Recording Acts (Overview)	Recording	Yes	Yes	No
47	Race Statute	Recording	Low	Yes	No
48	Notice Statute	Recording	Low	Yes	No
49	Race-Notice Statute	Recording	Yes	Yes	No
50	Lis Pendens	Recording	Yes	Yes	No
51	Marketable Title Acts	Recording	Yes	Yes	No
52	Lost Corner	PLSS	Yes	Yes	Yes
53	Obliterated Corner	PLSS	Yes	Yes	Yes
54	Proportionate Measurement	PLSS	Yes	Yes	Yes
55	Single Proportionate Measurement	PLSS	Yes	Yes	Yes
56	Double Proportionate Measurement	PLSS	Yes	Yes	Yes
57	Dedication (Common Law vs. Statutory)	Public Rights	Yes	Yes	No
58	Vacation of Streets/Easements	Public Rights	Yes	Yes	No
59	Eminent Domain / Condemnation	Public Rights	Yes	Yes	Moderate
60	Laches	Public Rights	Yes	Yes	No
61	Doctrine of Repose	Specialized	Yes	Yes	No
62	Cy Pres Doctrine	Specialized	Moderate	Low	No
63	Doctrine of Approximation	Specialized	Low	Low	No

A. Boundary Establishment and Location#

1. Follow the Footsteps (Retracement Doctrine)

Category: Boundary Establishment

Definition: The retracement surveyor's duty is to retrace the footsteps of the original surveyor who created the boundaries -- meaning to recover the original corner positions and lines as they were originally established, rather than creating new boundaries through modern measurements. A parcel, once established, should remain fixed through any series of conveyances. The retracing surveyor must identify and follow the evidence left by the original surveyor.

Citation: Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Section 1-1

Source Quote:

"The retracement surveyor's duty, often stated as, 'Follow in the footsteps of the original surveyor,' is a feat that cannot be done without a comprehensive knowledge of past events." -- Evidence & Procedures, Ch. 1

Additional Source: Brown's Boundary Control and Legal Principles (7th ed., 2014), Ch. 2, Principle 3

"A surveyor can be retained to locate on the ground a boundary line which has theretofore been established. When he does this, he 'traces the footsteps' of the 'original surveyor' in locating existing boundaries. Correctly stated, this is a 'retracement' survey, not a resurvey, and in performing this function, the second and each succeeding surveyor is a 'following' or 'tracing' surveyor and his sole duty, function and power is to locate on the ground the boundaries, corners and boundary line or lines established by the original survey; he cannot establish a new corner or new line terminal point, nor may he correct errors of the original surveyor. He must only track the footsteps of the original surveyor. The following surveyor, rather than being the creator of the boundary line, is only its discoverer and is only that when he correctly locates it." -- Brown's Boundary Control, Ch. 2 (quoting Rivers v. Lozeau)

Additional Source: Wattles, Writing Legal Descriptions (1976), Ch. 4, p. 4.3-4.4

"Monuments [are] indicative of the footsteps of the surveyor and therefore they represent the actual physical placement of the line, whereas the courses and distances used to describe the line are only indicative of the survey." -- Wattles, Ch. 4

Exam Relevance:

CA PLS: Yes -- fundamental to retracement surveys, tested extensively
PS: Yes -- core boundary law principle
FS: No

Related Doctrines: Original vs. Retracement Survey, Monuments Control, Hierarchy of Calls

2. Original vs. Retracement Survey

Category: Boundary Establishment

Definition: An original survey creates boundaries and corners that, once established, are without error in a legal sense. A retracement survey locates boundaries and corners previously established by the original survey. The retracing surveyor cannot create new corners or lines but must recover the evidence of the original survey. The original surveyor creates boundaries; the retracing surveyor ascertains or identifies boundaries from the original evidence.

Citation: Brown's Boundary Control and Legal Principles (7th ed., 2014), Ch. 2, Sections 2.6-2.10; Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Section 4-5; BLM Manual of Surveying Instructions (2009), Sections 5-2, 5-10, 5-14

Source Quote:

"The object of an original survey is to create boundary lines. The object of a retracement is to find the evidence (footsteps) of the original surveyor and then to redescribe the footsteps by today's standards." -- Brown's Boundary Control, Ch. 2

"When once created, all corners and lines created by an original survey are without error, in a legal sense." -- Evidence & Procedures, Ch. 4

"A dependent resurvey is a retracement and reestablishment of the lines of the original survey or of a prior resurvey in their true original positions according to the best available evidence of the positions of the original corners." -- BLM Manual, Section 5-14

Exam Relevance:

CA PLS: Yes -- critical distinction for all survey work
PS: Yes -- tested extensively in boundary law
FS: Yes -- appears in fundamentals of surveying

Related Doctrines: Follow the Footsteps, Lost Corner, Obliterated Corner, Proportionate Measurement

3. Monuments Control

Category: Boundary Establishment

Definition: The legal principle that monuments (physical objects called for in a deed or survey) control over courses and distances when there is a conflict between them. Natural monuments control over artificial monuments. This is one of the most inflexible rules in real estate law and applies to both public (GLO) surveys and private conveyances. The basis for the rule is that monuments represent the actual physical placement of the line by the original surveyor, while courses and distances are merely records of that work.

Citation: Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Section 5-10, Appendix C

Source Quote:

"No rule in real estate law is more inflexible than that monuments control course and distance, -- a rule that we have frequent occasion to apply in the case of public surveys, where its propriety, justice and necessity are never questioned." -- Evidence & Procedures, Appendix C

Additional Source: Brown's Boundary Control and Legal Principles (7th ed., 2014), Ch. 5, Section 5.3

"Courses and distances occupy the lowest, instead of the highest grade, in the scale of evidence, as to the identification of land." -- Brown's Boundary Control, Ch. 5 (quoting Justice Lumpkin, 1855)

"Monuments called for in a deed, either directly or by a survey, or by reference to a plat that the parties relied on, are subordinate to senior rights, clearly stated contrary intentions, and original lines actually marked and surveyed, but are presumed superior to direction, distance, or area." -- Brown's Boundary Control, Ch. 11, Principle 11

Additional Source: Wattles, Writing Legal Descriptions (1976), Ch. 4, p. 4.3

"Monuments [are] indicative of the footsteps of the surveyor and therefore they represent the actual physical placement of the line, whereas the courses and distances used to describe the line are only indicative of the survey." -- Wattles, Ch. 4

Additional Source: Clark, Treatise on Law of Surveying and Boundaries (1922), Section 460

"Monuments control over quantity. -- A definite description in a deed naming the point of beginning, the monuments, and courses and distances, followed by a statement as to the number of acres conveyed, passes only the quantity of land included in the specified boundary, though that is less than the number of acres stated." -- Clark, Section 460

Exam Relevance:

CA PLS: Yes -- fundamental rule of construction
PS: Yes -- core boundary law principle
FS: Yes -- tested in basic boundary concepts

Related Doctrines: Hierarchy of Calls, Follow the Footsteps, Priority of Calls

4. Hierarchy of Calls (Priority of Calls)

Category: Boundary Establishment

Definition: An established order of superiority among the various elements (calls) in a legal description, used to resolve conflicts. When elements in a description disagree, the hierarchy determines which controls. The general hierarchy (in descending order) is: (1) senior rights and unwritten rights, (2) intent of the parties, (3) calls for natural monuments, (4) calls for artificial monuments, (5) calls for adjoining parcels, (6) courses/bearings, (7) distances, and (8) area.

Citation: Brown's Boundary Control and Legal Principles (7th ed., 2014), Ch. 5, Section 5.20; Wattles, Writing Legal Descriptions (1976), Ch. 4, p. 4.1-4.3; Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Section 6-26

Source Quote:

"In applying the priority of calls, it is not a selection of 'pick the one I like most' but a rule of survey of evidence: evidence that was created at the time of the survey, evidence that was described in the instruments, evidence that was searched for in the retracement, and evidence evaluated as accepted to locate the boundary line." -- Brown's Boundary Control, Ch. 5

Brown's priority list (Section 5.20): (1) Lines actually run on the ground by the creating surveyor, (2) Calls for monuments (natural, then artificial), (3) Calls for adjoining parcels senior in title, (4) Calls for courses (bearings, then distances), (5) Control of area.

"In order to have some semblance of relationships in the value of various parts of control in descriptions, there has been established an order of superiority of calls (sometimes called elements), commonly known as 'rules of construction.'" -- Wattles, Ch. 4

"In the order of importance of items that may prove the intent of a deed, evidence of measurement ranks below senior rights of adjoiners and monuments." -- Evidence & Procedures, Ch. 6

Exam Relevance:

CA PLS: Yes -- heavily tested; must know the complete hierarchy
PS: Yes -- core boundary law principle
FS: Yes -- basic surveying fundamentals

Related Doctrines: Monuments Control, Senior/Junior Rights, Construction vs. Interpretation

5. Four Corners Doctrine

Category: Boundary Establishment

Definition: The principle that a deed must be read and interpreted by examining the entire document ("taking it by the four corners"), not just isolated parts. The intent of the parties should be gathered from the complete language used in the instrument. Modern courts have largely relaxed the strict version of this rule and now generally allow extrinsic evidence to explain latent ambiguities.

Citation: Wattles, Writing Legal Descriptions (1976), Ch. 5, p. 5.3; Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Section 3-12

Source Quote:

"In Walsh v. Hill, Judge Sanderson said, 'The only rule of much value -- one which is frequently shadowed forth, but seldom, if ever, expressed in books -- is to place ourselves as nearly as possible in the seats which were occupied by the parties at the time the instrument was executed; then, taking it by the four corners, read it.'" -- Wattles, Ch. 5

"When discussing the four-corners rule, a New York court wrote, 'the antiquated doctrine that a document must be construed solely within its four corners, no matter how puzzling the problem, is no longer the law of this state.'" -- Evidence & Procedures, Ch. 3

Exam Relevance:

CA PLS: Yes -- deed interpretation is heavily tested
PS: Yes -- core evidence doctrine
FS: No

Related Doctrines: Parol Evidence Rule, Extrinsic Evidence, Construction vs. Interpretation

6. Construction Against the Grantor

Category: Boundary Establishment

Definition: The rule that ambiguities in a private grant are interpreted in favor of the grantee, while reservations are held in favor of the grantor. For public bodies, grants are interpreted in favor of the grantor (to protect the public interest). More broadly, ambiguous terms are construed most strongly against the party who drafted the document (the scrivener).

Citation: Brown's Boundary Control and Legal Principles (7th ed., 2014), Ch. 11, Section 11.37; Wattles, Writing Legal Descriptions (1976), Ch. 5, p. 5.3-5.4; Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Section 15-28

Source Quote:

"Because language used in the instrument was selected by the grantor, who should have been more familiar with the property, the deed should be construed most strongly against the grantor. This rule applies only where two or more meanings are possible, but not where one of the parties misunderstands a clearly expressed written meaning." -- Brown's Boundary Control, Ch. 11

"The rule is that a private grant must be interpreted in favor of the grantee but that any reservation is held in favor of the grantor. On the other hand, every grant by a public body, or officer thereof, must be interpreted in favor of the grantor probably because the public body is always bound to protect the public interest for sake of future citizens." -- Wattles, Ch. 5

"Also, any ambiguous terms usually will be construed most strongly against the grantor or the individual who wrote the document." -- Evidence & Procedures, Ch. 15

Exam Relevance:

CA PLS: Yes -- deed interpretation questions
PS: Yes -- boundary law principle
FS: No

Related Doctrines: Four Corners Doctrine, Construction vs. Interpretation, General vs. Specific Intent

7. Boundary by Agreement

Category: Boundary Establishment

Definition: If a boundary line between adjoining owners is unknown or in dispute, and if the owners verbally agree on a line and take possession to that line, that agreed-upon boundary may become the true boundary, regardless of the location of the written property line. Common law requires that the boundary must either be in dispute or unascertainable. The agreement is binding only between the parties and their privies (successors).

Citation: Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Section 13-8

Source Quote:

"If a boundary line existing between adjoining owners is unknown or in dispute and if the adjoining owner(s) verbally agree on a line and take possession to that line, that agreed-upon boundary may become the true boundary, regardless of the location of the written property line." -- Evidence & Procedures, Ch. 13

Exam Relevance:

CA PLS: Yes -- unwritten rights heavily tested
PS: Yes -- boundary law doctrine
FS: No

Related Doctrines: Practical Location, Acquiescence, Estoppel, Statute of Frauds

8. Boundary by Acquiescence

Category: Boundary Establishment

Definition: The silent acceptance of a boundary line over a period of time, which may imply an agreement between adjoining landowners even where no express agreement existed. Acquiescence depends on the silence of a party when that party should have spoken up. In many jurisdictions, acquiescence for the statutory period can establish a boundary line. If the true boundary can be ascertained from the deed, acquiescence is treated as a mistake and neither party is estopped from claiming the true line.

Citation: Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Section 13-15; Clark, Treatise on Law of Surveying and Boundaries (1922), Section 565

Source Quote:

"Evidence of recognition and acquiescence often implies an agreement, although none may have existed. Recognition and acquiescence depend on the silence of a party when that party should have spoken up." -- Evidence & Procedures, Ch. 13

"Where there is an acquiescence in a wrong boundary when the true boundary may be ascertained by deed, it is treated, both in law and equity, as a mistake, and neither party is estopped from claiming to the true line." -- Clark, Section 565

Additional Source: Wattles, Writing Legal Descriptions (1976), Ch. 10, p. 10.3

"Where there is acquiescence in a wrong boundary and the true boundary may be ascertained by the deed, the acquiescence is treated both in law and equity as a mistake and neither party is estopped to claim to the true line." -- Wattles, Ch. 10

Exam Relevance:

CA PLS: Yes -- unwritten rights are heavily tested
PS: Yes -- boundary law doctrine
FS: No

Related Doctrines: Practical Location, Boundary by Agreement, Estoppel, Adverse Possession

9. Practical Location

Category: Boundary Establishment

Definition: An actual mutual designation by adjoining owners of the location of their dividing line on the ground. Unlike an unwritten agreement (which is a contract), practical location is an act -- such as erecting a fence -- that requires cooperation of both parties. A unilateral action has no binding effect. It differs from acquiescence in that practical location involves active participation by both parties, while acquiescence involves passive acceptance.

Citation: Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Section 13-13; Wattles, Writing Legal Descriptions (1976), Ch. 10

Source Quote:

"Practical location by adjoining owners is an actual mutual designation of the location of their dividing line on the ground. ... The difference between the practical location of a line and an unwritten agreement on a line is that a practical location is a mutual designation by both parties about what they believe to be the true division line, whereas an unwritten agreement on a line is agreeing to accept the line designated whether or not it is the true line." -- Evidence & Procedures, Ch. 13

"The 'practical location,' that [is] the execution and exchange of documents of conveyance by the holders of fee title based on an agreed line, that legally establishes a formerly questionable status is desirable." -- Wattles, Ch. 10

Exam Relevance:

CA PLS: Yes -- unwritten rights are heavily tested
PS: Yes -- boundary law doctrine
FS: No

Related Doctrines: Boundary by Agreement, Acquiescence, Estoppel

10. Boundary by Estoppel

Category: Boundary Establishment

Definition: A legal doctrine (not a type of unwritten agreement) that serves as a bar or preclusion to alleging or denying a fact because of previous actions. In boundary disputes, estoppel by conduct applies where a party, through acts, declarations, conduct, admissions, or omissions, misleads another to that person's injury. Four elements must be proven: (1) the estopping party knew the facts, (2) intended the conduct to be acted on, (3) the claimant was ignorant of the facts, and (4) the claimant relied on the conduct and was damaged.

Citation: Brown's Boundary Control and Legal Principles (7th ed., 2014), Ch. 1, Section 1.15; Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Sections 13-6, 13-7; Clark, Treatise on Law of Surveying and Boundaries (1922), Sections 553-554, 570

Source Quote:

"An estoppel is a legal bar raised by the law which precludes a person, because of his or her conduct, from asserting rights that he or she might otherwise have." -- Brown's Boundary Control, Ch. 1

"The doctrine of estoppel, a legal doctrine and not a type of unwritten agreement, is a principle at law that sometimes makes unwritten agreements effective. Estoppel is a bar or preclusion to one's alleging or denying a fact because of previous actions." -- Evidence & Procedures, Ch. 13

"Where the grantor of certain real estate showed the purchaser the wrong line, and was cognizant of his acting on that information, and stood silent while a house was being erected and money expended, he thereby directly led the purchaser into a line of conduct prejudicial to his interest and should not afterwards be heard alleging anything to the contrary. Such acts would constitute an 'estoppel in pais.'" -- Clark, Section 570

Exam Relevance:

CA PLS: Yes -- unwritten rights are heavily tested
PS: Yes -- boundary law doctrine
FS: No

Related Doctrines: Acquiescence, Boundary by Agreement, Detrimental Reliance, Dedication

11. Adverse Possession

Category: Boundary Establishment

Definition: A doctrine used to create title through possession for a statutory period under certain conditions. It maintains a status quo by penalizing the title owner for failing to act on their rights within the limitations imposed by law. The adverse claimant bears the burden of proof and must show possession that is actual, open, notorious, continuous, adverse/hostile, and peaceful for the entire statutory period. The resulting title is a new and independent title by operation of law, not a conveyance from the prior owner.

Citation: Brown's Boundary Control and Legal Principles (7th ed., 2014), Ch. 3, Section 3.4; Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Sections 13-30 through 13-34; Wattles, Writing Legal Descriptions (1976), Ch. 10

Source Quote:

"The law presumes that possession by the adverse possessor is in subordination to that of the rightful owner. Thus, title by adverse possession must be established by clear and positive proof." -- Brown's Boundary Control, Ch. 7 (quoting Redfern v. Kuhia)

"Adverse possession is a doctrine used to create title through possession for a statutory period under certain conditions. ... The doctrine of adverse possession merely maintains a status quo. It is certainly not for the merit of the adverse occupant, since the taking of another's land has no merit. It is probably a penalty against the true owner, since he or she has failed to act on his or her rights within the limitations imposed by law." -- Evidence & Procedures, Ch. 13

"Many conditions must prevail such as possession in actuality, adversely, with continuousness, hostility, openness, notoriousness, claim of right and exclusiveness; color of title under some statutes is not always essential but it does carry evidentiary value." -- Wattles, Ch. 10

Exam Relevance:

CA PLS: Yes -- heavily tested; CA requires 5-year statutory period plus tax payment
PS: Yes -- core boundary law doctrine
FS: No

Related Doctrines: Prescriptive Easements, Acquiescence, Tacking, Color of Title, Claim of Right, Statute of Limitations

12. Prescriptive Easements

Category: Boundary Establishment

Definition: An easement obtained through long usage of land under conditions essentially the same as adverse possession, but the court awards only a right to use the property rather than title to it. Where adverse possession entitles one to occupy the land, a prescriptive easement merely permits one to use the land. Use of land for a traveled way or pipeline seldom results in a fee right -- only an easement.

Citation: Brown's Boundary Control and Legal Principles (7th ed., 2014), Ch. 1, Section 1.15; Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Section 13-2

Source Quote:

"The requirements for creation of an easement by prescription vary from state to state but are usually the same as those for adverse possession. They are: 1. Adverse use without permission 2. Open and notorious use 3. Continuous use 4. Use for a specific purpose 5. Use for the statutory period" -- Brown's Boundary Control, Ch. 1

"Although the requirements for a prescriptive easement and adverse possession are essentially the same, what the court will award is entirely different. With a prescriptive easement, one gets to use the property, but with adverse possession, one gets title to the property." -- Evidence & Procedures, Ch. 13

Exam Relevance:

CA PLS: Yes -- tested alongside adverse possession; CA Civil Code Section 1008
PS: Yes -- boundary law doctrine
FS: No

Related Doctrines: Adverse Possession, Easement by Necessity, Easement by Implication

B. Water Rights and Boundaries#

13. Accretion

Category: Water Rights & Boundaries

Definition: The gradual and imperceptible accumulation of land by natural causes along a water boundary. When property borders water, any gradual accretion carries the title boundary with it. The key legal requirement is that the process must be gradual and imperceptible -- sudden changes fall under avulsion instead. A riparian owner may not benefit from artificially caused accretion resulting from their own actions.

Citation: Wattles, Writing Legal Descriptions (1976), Ch. 6, p. 6.3; Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Section 8-15

Source Quote:

"ACCRETION is the act of growing to a thing; usually applied to the gradual and imperceptible accumulation of land by natural causes, as out of the sea or a river." -- Wattles, Ch. 6

Exam Relevance:

CA PLS: Yes -- Cal. Civil Code Section 1014; water boundaries tested
PS: Yes -- universal boundary law principle
FS: No

Related Doctrines: Reliction, Avulsion, Ambulatory Boundaries, Riparian Rights

14. Reliction (Dereliction)

Category: Water Rights & Boundaries

Definition: The increase of land area resulting from the permanent withdrawal or recession of water. A person may gain land by reliction. Along with accretion and erosion, reliction represents a natural change in water boundaries that causes the boundary to shift with the water line.

Citation: Wattles, Writing Legal Descriptions (1976), Ch. 6, p. 6.3; Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Section 8-15

Source Quote:

"RELICTION is an increase of the land by the permanent withdrawal or retrocession of the sea or a river." -- Wattles, Ch. 6

"A person may lose land by erosion or gain land by reliction or accretion. The initial right to follow receding or encroaching waters is defined or implied by a written conveyance, but the actual land area of a person's holdings is increased or decreased without a change in the writings." -- Evidence & Procedures, Ch. 13

Exam Relevance:

CA PLS: Yes -- water boundaries
PS: Yes -- boundary law principle
FS: No

Related Doctrines: Accretion, Avulsion, Ambulatory Boundaries

15. Avulsion

Category: Water Rights & Boundaries

Definition: The sudden and perceptible removal of land from one property and its deposit upon another by water action. Because the change is sudden and recognizable (unlike accretion), ownership does not change and the boundary does not follow the new water line. In many jurisdictions, affected owners have a limited time (typically one year) to reclaim avulsed land.

Citation: Wattles, Writing Legal Descriptions (1976), Ch. 6, p. 6.3; Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Section 8-15

Source Quote:

"AVULSION is the removal of a considerable quantity of [land] from the land of one man, and its deposit upon or annexation to the land of another, suddenly and by perceptible action of water. Because the change is not gradual and imperceptible, the ownership does not change and follow the new water lines." -- Wattles, Ch. 6

"In general, water boundaries change with shoreline changes. However, sudden changes due to avulsive activities generally do not result in a boundary shift." -- Evidence & Procedures, Ch. 8

Exam Relevance:

CA PLS: Yes -- Cal. Civil Code Section 1015; water boundary questions
PS: Yes -- boundary law principle
FS: No

Related Doctrines: Accretion, Reliction, Ambulatory Boundaries

16. Riparian Rights

Category: Water Rights & Boundaries

Definition: The rights of landowners whose property borders upon a river, stream, lake, or pond. Land beyond the natural watershed is not "riparian." Riparian rights are acquired by law as an incident of ownership of riparian lands and include rights to water access, use, wharfage, and accretion/reliction benefits. Riparian owners generally hold title to the center (thread) of non-navigable streams.

Citation: Wattles, Writing Legal Descriptions (1976), Ch. 6, p. 6.1

Source Quote:

"Riparian owners are those whose lands border upon a river, stream, lake or pond. Land lying beyond the natural watershed of a stream is not 'riparian.'" -- Wattles, Ch. 6

Exam Relevance:

CA PLS: Yes -- California water law questions
PS: Yes -- boundary law principle
FS: No

Related Doctrines: Littoral Rights, Thalweg Doctrine, Ordinary High Water Mark, Accretion

17. Littoral Rights

Category: Water Rights & Boundaries

Definition: The rights of landowners whose property borders upon the sea, ocean, or Great Lakes. While technically distinct from riparian rights (which apply to rivers and streams), common usage has broadened "riparian" to encompass littoral situations as well. Littoral owners' boundaries are typically determined by the mean high tide line (tidal waters) rather than the ordinary high water mark.

Citation: Wattles, Writing Legal Descriptions (1976), Ch. 6, p. 6.1

Source Quote:

"Littoral owners are those whose lands border upon the sea, ocean or Great Lakes. However, usage has broadened the concept of riparian to the extent that littoral lands and rights are often described as riparian." -- Wattles, Ch. 6

Exam Relevance:

CA PLS: Yes -- coastal property questions
PS: Yes -- boundary law distinction
FS: No

Related Doctrines: Riparian Rights, Mean High Tide Line, Public Trust Doctrine

18. Ordinary High Water Mark (OHWM)

Category: Water Rights & Boundaries

Definition: The line between a riparian owner and the public, determined by examining the bed and banks to ascertain where the presence and action of water is so common and long-continued in all ordinary years as to mark upon the soil a character distinct from that of the banks. It is a physical fact determined by inspection of vegetation and soil character, not by arithmetical calculation or gauge readings.

Citation: Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Sections 8-11, 8-13; Wattles, Writing Legal Descriptions (1976), Ch. 6

Source Quote:

"High-water mark, as a line between a riparian owner and the public, is to be determined by examining the bed and banks, and ascertaining where the presence and action of the water is so common and usual, and so long continued in all ordinary years as to mark upon the soil of the bed a character distinct from that of the banks, in respect to vegetation as well as respects the nature of the soil itself." -- Evidence & Procedures, Ch. 8

"In fresh water, the ordinary high water mark is established by evidence of vegetation along the banks and the distinct marking of the soil by the continuous periodic action of the water to the extent that it makes it unfit for agricultural purposes." -- Wattles, Ch. 6

Exam Relevance:

CA PLS: Yes -- water boundary determination
PS: Yes -- boundary law principle
FS: No

Related Doctrines: Public Trust Doctrine, Riparian Rights, Ambulatory Boundaries, Meander Lines

19. Thalweg Doctrine (Thread of the Stream)

Category: Water Rights & Boundaries

Definition: The doctrine that the boundary in a stream should be located at the thalweg -- the deepest part of the channel -- rather than the geographical center of the stream. This approach ensures equal access to water for landowners on either side, even when the stream drops to low stages. For non-navigable streams, the boundary is typically the thread (center line); for navigable streams, it may be the thalweg.

Citation: Wattles, Writing Legal Descriptions (1976), Ch. 6; Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Section 8-14

Source Quote:

"The thread of the stream is defined as a median line halfway between opposite shore lines measured neither in a dry condition nor a swollen condition but at an average or natural stage of existence." -- Wattles, Ch. 6

"The second approach to the center of the stream question holds the boundary to be the thalweg, or deepest part, of the channel. ... It is this author's opinion that the thalweg represents the most equitable line for either application." -- Evidence & Procedures, Ch. 8

Exam Relevance:

CA PLS: Yes -- water boundary determination
PS: Yes -- boundary law principle
FS: No

Related Doctrines: Riparian Rights, Ordinary High Water Mark, Meander Lines

20. Meander Lines

Category: Water Rights & Boundaries

Definition: Survey lines that approximate the margin of a permanent natural body of water. Meander lines are NOT boundaries -- they are run to define the sinuosities of water lines and to compute the quantity (acreage) of land. The actual boundary is the ordinary high water mark or line of mean high tide, not the meander line. This distinction is critical: many assume meander lines are boundaries, but they are merely measurement tools.

Citation: BLM Manual of Surveying Instructions (2009), Sections 3-159, 6-30; Wattles, Writing Legal Descriptions (1976), Ch. 6; Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Section 10-21

Source Quote:

"Numerous decisions in the United States Supreme Court assert the principle that, in original surveys, meander lines are run, not as boundaries of the parcel, but [for defining sinuosities, platting, and acreage calculations]. The ordinary high water mark (OHWM), or line of mean high tide (line of MHT) of the stream, or other body of water, and not the meander line as actually run on the ground, is the actual boundary." -- BLM Manual

"Meander lines are not boundaries defining the area of ownership next to water but are run to define the sinuosities of water lines and for the purpose of ascertaining the quantity of land embraced within the survey for patent." -- Wattles, Ch. 6

"Perhaps the impression still lingers in some minds that the meander lines are boundary lines, and that all in front of them remains unsold. Of course this is erroneous." -- Evidence & Procedures, Appendix C

Exam Relevance:

CA PLS: Yes -- water boundary and PLSS questions
PS: Yes -- frequently tested misconception
FS: Yes -- appears in PLSS fundamentals

Related Doctrines: Ordinary High Water Mark, Riparian Rights, Public Trust Doctrine

21. Ambulatory Boundaries

Category: Water Rights & Boundaries

Definition: Boundaries that move over time as the physical feature they reference changes position. Water boundaries are the primary example: shorelines shift as land erodes or accretes, and boundary location must be related to a specific point in time. Contour-based boundaries (e.g., "the 100-foot contour line") are also ambulatory by definition.

Citation: Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Section 7-12

Source Quote:

"Therefore, the line may be ambulatory and its location should be related to a specific point in time." -- Evidence & Procedures, Ch. 7

Exam Relevance:

CA PLS: Yes -- water boundary questions
PS: Yes -- boundary law concept
FS: No

Related Doctrines: Accretion, Reliction, Avulsion, Ordinary High Water Mark

22. Public Trust Doctrine

Category: Water Rights & Boundaries

Definition: The doctrine that the sovereign (state) holds title to the beds under navigable waters in trust for public use. Rooted in Roman civil law and English common law, it establishes that navigable waters and their submerged lands are commonly owned by the public. In the United States, the doctrine extends to navigable nontidal (inland) waters as well as tidal waters, unlike English common law which was limited to tidal waters.

Citation: Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Sections 8-2, 8-3

Source Quote:

"A unique characteristic of many water boundaries is that they represent the line between privately owned upland and submerged land held in the public trust. This public interest is by virtue of the public trust doctrine, which, although chiefly a product of English common law, has roots as far back as the ancient Roman Civil Code of Emperor Justinian I." -- Evidence & Procedures, Ch. 8

Exam Relevance:

CA PLS: Yes -- California applies this doctrine broadly
PS: Yes -- water boundary law
FS: No

Related Doctrines: Navigability, Ordinary High Water Mark, Riparian Rights, Littoral Rights

C. Evidence and Interpretation#

23. Parol Evidence Rule

Category: Evidence & Interpretation

Definition: Once an agreement or deed is reduced to writing, oral testimony (parol evidence) cannot be used to overcome clear, unambiguous written words. Parol evidence is inadmissible to vary, alter, or contradict the terms of an unambiguous deed. However, parol evidence may be admitted to explain latent ambiguities or to identify the location of objects called for in the description. Evidence consistent with the writing may assist in construction, but evidence contradicting it may not.

Citation: Brown's Boundary Control and Legal Principles (7th ed., 2014), Ch. 11, Principle 4; Wattles, Writing Legal Descriptions (1976), Ch. 5, p. 5.3-5.4; Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Section 2-17

Source Quote:

"Parol evidence may not be taken to determine the terms of a deed but may be used only to explain ambiguous terms of a deed. ... To allow an owner to express an opinion as to what the terms of a deed were is equivalent to permitting land to be transferred by parol means." -- Brown's Boundary Control, Ch. 11

"Parol or extrinsic evidence may not be admitted 'to add to or vary a description that is definite and certain.' Nor may it be used to explain an apparent ambiguity in the conveyance." -- Wattles, Ch. 5

"Where the land is described by course and distance and/or monuments, parol evidence is inadmissible to prove that the true boundary is a line of marked trees not mentioned in the deed, or that a deed stating a definite thing was intended to express another, or to alter or vary the legal import of monuments, the location of which has been ascertained." -- Evidence & Procedures, Ch. 2

Exam Relevance:

CA PLS: Yes -- deed interpretation questions
PS: Yes -- evidence doctrine
FS: No

Related Doctrines: Patent vs. Latent Ambiguity, Extrinsic Evidence, Four Corners Doctrine, Statute of Frauds

24. Patent vs. Latent Ambiguity

Category: Evidence & Interpretation

Definition: A patent ambiguity is a defect appearing on the face of the conveyance itself -- so unclear that the description describes nothing in particular (e.g., "a house and lot on Main Street"). A latent ambiguity is a defect not apparent on the face of the instrument but which becomes apparent when the instrument is applied to conditions on the ground. Traditionally, extrinsic evidence could cure latent but not patent ambiguities. The modern trend extends "latent" broadly and allows extrinsic evidence more liberally.

Citation: Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Section 2-21

Source Quote:

"A patent ambiguity is a defect appearing on the face of the conveyance itself. A deed reading 'a house and lot on Main Street' describes nothing in particular and contains a patent ambiguity that cannot be remedied by other evidence. A latent defect -- that is, a defect not apparent on the face of the instrument but apparent when the instrument is applied to matters outside the instrument, can be cured by extrinsic evidence." -- Evidence & Procedures, Ch. 2

Exam Relevance:

CA PLS: Yes -- deed interpretation and evidence questions
PS: Yes -- evidence doctrine
FS: No

Related Doctrines: Parol Evidence Rule, Extrinsic Evidence, Four Corners Doctrine

25. Extrinsic vs. Intrinsic Evidence

Category: Evidence & Interpretation

Definition: Extrinsic evidence is evidence derived from sources outside the written instrument -- oral testimony, physical evidence on the ground, surveys, maps, and other documents. Intrinsic evidence comes from the deed or document itself. When a deed's words are clear and unambiguous, extrinsic evidence cannot be introduced to vary them. But when the words need explanation, extrinsic evidence may be sought to explain the meaning and the conditions existing as of the date of the deed.

Citation: Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Section 2-21

Source Quote:

"Extrinsic evidence is derived from sources outside the writings. ... Once an agreement or deed is reduced to writing, testimony cannot be used to overcome clear, unambiguous, written words. But if the words are not clear and need explanation, extrinsic evidence, that is, evidence other than the writing itself, may be sought to explain the words." -- Evidence & Procedures, Ch. 2

Exam Relevance:

CA PLS: Yes -- evidence questions
PS: Yes -- evidence doctrine
FS: No

Related Doctrines: Parol Evidence Rule, Patent vs. Latent Ambiguity, Four Corners Doctrine

26. General vs. Specific Intent

Category: Evidence & Interpretation

Definition: When a description contains questionable wording, one must determine the intent of the parties. General intent refers to the overall purpose of the conveyance (presumed to be valid and effective). Specific intent refers to the particular meaning of individual words and phrases. Intent is developed from the construction of the wording in the deed -- the presumption being that the creators intended the deed to be valid. Words are analyzed to produce legal effectiveness rather than a void.

Citation: Wattles, Writing Legal Descriptions (1976), Ch. 7, p. 7.23-7.24

Source Quote:

"Intention developed from construction of the wording in the deed: it is a correct presumption that the creator(s) of the deed intended it to be valid. From that basic concept, one must analyze the meaning of words actually used in the description in such a way as to result in legal effectiveness instead of a void." -- Wattles, Ch. 7

Exam Relevance:

CA PLS: Yes -- deed interpretation
PS: Yes -- evidence principle
FS: No

Related Doctrines: Construction vs. Interpretation, Four Corners Doctrine, Construction Against the Grantor

27. Construction vs. Interpretation of Deeds

Category: Evidence & Interpretation

Definition: Construction is the process of applying legal rules to determine the meaning of words in a deed when those words are ambiguous. Interpretation is the process of determining the ordinary meaning of the words used. When words are clear and unambiguous, they are interpreted according to their plain meaning. When ambiguity exists, rules of construction (including the hierarchy of calls) are applied to resolve the conflict. The intent of the parties, if it can be gathered from the language used, is the controlling factor.

Citation: Wattles, Writing Legal Descriptions (1976), Ch. 5, p. 5.3-5.5

Source Quote:

"The intent of the parties to document, if the intent can be gathered from the language used, is the controlling factor even over the usual guides." -- Wattles, Ch. 5 (citing Walsh v. Hill)

Exam Relevance:

CA PLS: Yes -- deed interpretation questions
PS: Yes -- evidence principle
FS: No

Related Doctrines: Four Corners Doctrine, Hierarchy of Calls, General vs. Specific Intent, Parol Evidence Rule

28. Statute of Frauds

Category: Evidence & Interpretation

Definition: Originally enacted by Parliament in 1677 ("A Statute to Prevent Fraud"), this law requires that certain contracts, including any contract or sale of lands, tenements, or hereditaments, must be in writing to be enforceable. It forms the basis for requiring that title to land be transferred and described in writing. However, oral boundary line agreements have been held not to violate the Statute of Frauds because they do not operate as conveyances but merely identify the location of an existing boundary.

Citation: Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Section 9-10; Wattles, Writing Legal Descriptions (1976), Ch. 10, p. 10.5

Source Quote:

"Section 4 of the Statute of Frauds states: No action shall be brought unless the agreement upon which such action shall be brought, or some memorandum or note thereof, shall be in writing, and signed by the party to be charged therewith or some other person thereunto by him lawfully authorized." -- Evidence & Procedures, Ch. 9

"Whether that agreement concerning a mutual boundary can or should be oral or written hinges on two other conditions. One is a statute based on old English law about fraud which requires, among other things, that agreements affecting interests in land in order to be valid must be in writing." -- Wattles, Ch. 10

Exam Relevance:

CA PLS: Yes -- foundation of conveyance law
PS: Yes -- property law principle
FS: No

Related Doctrines: Boundary by Agreement, Parol Evidence Rule, Acquiescence, Practical Location

D. Property and Conveyance#

29. Senior/Junior Rights (Successive Conveyance)

Category: Property & Conveyance

Definition: When parcels are created in sequence with a lapse of time between them, the earlier conveyance has senior rights. The first buyer is entitled to all the land called for in their deed, and the later (junior) buyer owns only the remainder. An intent gathered from written evidence cannot alter senior rights. When a person conveys part of their property, they cannot at a later date legally convey the same land to someone else. Lots created simultaneously (e.g., by subdivision plat filing) have equal rights.

Citation: Brown's Boundary Control and Legal Principles (7th ed., 2014), Ch. 11, Section 11.2; Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Section 3-16

Source Quote:

"Because the new parcel must receive all the land described, it is called the senior deed, and the remainder, at the time of conveyance, becomes the junior deed." -- Brown's Boundary Control, Ch. 11

"A person who has conveyed part of his or her property to another cannot at a later date, legally, convey it to someone else, irrespective of the person's written intent in a new conveyance. The first deed (senior) has a right to all the land that is called for, and the seller (junior) owns the remainder." -- Evidence & Procedures, Ch. 3

Exam Relevance:

CA PLS: Yes -- conveyance analysis questions
PS: Yes -- core boundary law principle
FS: No

Related Doctrines: Hierarchy of Calls, Strip and Gore, Simultaneous Conveyance, Overlap/Hiatus

30. Strip and Gore

Category: Property & Conveyance

Definition: A gore is a small, triangular piece of land, originally a New England term, usually referring to a narrow, sharp-pointed, triangular parcel more often occurring as a gap than an overlap between two surveys or conveyances. A strip is a narrow, elongated parcel. These arise when successive conveyances fail to account for all the land in a parent tract, leaving gaps (hiatuses) or creating overlaps between parcels. Related terms include hiatus (a gap where land is unaccounted for) and confusion (intermixture of land of two or more owners whose portions cannot be distinguished).

Citation: Brown's Boundary Control and Legal Principles (7th ed., 2014), Ch. 8, Section 8.8; Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Section 11-5

Source Quote:

"A gore is a small, triangular piece of land. The term, originally applied in New England, usually refers to a narrow, sharp-pointed, triangular parcel of land, more often occurring as a gap than an overlap." -- Evidence & Procedures, Ch. 11

"There is also a presumption that the grantor did not intend to retain a narrow strip along an outside line." -- Brown's Boundary Control, Ch. 4

Exam Relevance:

CA PLS: Yes -- subdivision and conveyance analysis
PS: Yes -- boundary law concept
FS: No

Related Doctrines: Senior/Junior Rights, Hiatus, Overlap, Remnant/Remainder Parcel

31. Bona Fide Purchaser (BFP)

Category: Property & Conveyance

Definition: A person who purchases real property in good faith, for valuable consideration, and without notice (actual, constructive, or inquiry) of any prior unrecorded claim or interest. A bona fide purchaser is protected under recording acts against prior unrecorded interests. The BFP doctrine is central to the operation of all recording systems and determines who prevails when competing claims exist to the same property.

Citation: Black's Law Dictionary (11th ed., 2019), "bona fide purchaser"; Restatement (Third) of Property: Servitudes Section 7.14

Source Quote:

Standard legal definition: A bona fide purchaser is one who pays valuable consideration, has no knowledge of outstanding rights, and acts in good faith. The purchaser must be without notice at the time of the conveyance.

Exam Relevance:

CA PLS: Yes -- recording acts and title priority
PS: Yes -- property law principle
FS: No

Related Doctrines: Constructive Notice, Recording Acts, Race-Notice Statute, Chain of Title

32. After-Acquired Title (Estoppel by Deed)

Category: Property & Conveyance

Definition: When a grantor conveys property by warranty deed that the grantor does not actually own, and the grantor later acquires title to that property, the title automatically passes to the grantee. The grantor is "estopped" from denying the deed's validity. This doctrine applies only to warranty deeds, not quitclaim deeds, because a quitclaim conveys only whatever interest the grantor has at the time (which may be nothing). For surveyors, this is relevant when tracing chains of title where a gap in ownership was later cured.

Citation: Restatement (Third) of Property: Wills & Other Donative Transfers Section 2.6; Black's Law Dictionary (11th ed., 2019), "estoppel by deed"

Source Quote:

Standard legal principle: When a grantor purports to convey by warranty deed an estate greater than that which the grantor possesses, and the grantor subsequently acquires the estate purported to be conveyed, the after-acquired title inures to the benefit of the grantee.

Exam Relevance:

CA PLS: Yes -- chain of title analysis
PS: Yes -- conveyance doctrine
FS: No

Related Doctrines: Warranty Deed vs. Quitclaim, Chain of Title, Deed Reformation

33. Doctrine of Merger (Easements)

Category: Property & Conveyance

Definition: When one person acquires both the dominant and servient estates (ownership of both the property benefited by an easement and the property burdened by it), the easement is extinguished because a person cannot hold an easement over their own land. Unity of title destroys the need for the easement. The merger must be complete -- all ownership interests in both parcels must vest in the same person. If the properties are later separated, the easement does not automatically revive; it must be re-created.

Citation: Brown's Boundary Control and Legal Principles (7th ed., 2014), Ch. 1, Section 1.15; Restatement (Third) of Property: Servitudes Section 7.5

Source Quote:

"Easements are terminated by merger. Because a person can never have an easement over his or her own land, if he or she acquires a parcel of land over which he or she has an easement, the easement ceases to exist. Stated in legal terms, when the dominant and servient estates are united in one entity, easements are extinguished and are not revived by a later separation." -- Brown's Boundary Control, Ch. 1

Exam Relevance:

CA PLS: Yes -- easement analysis on subdivision maps and ALTA surveys
PS: Yes -- easement termination
FS: No

Related Doctrines: Easement Appurtenant, Dominant/Servient Estate, Unity of Title

34. Doctrine of Relation Back

Category: Property & Conveyance

Definition: The doctrine that treats a later-completed act as if it occurred at an earlier date. In property conveyance, the primary application is in escrow transactions: a deed deposited in escrow and later delivered to the grantee is treated as having been delivered on the date it was originally deposited with the escrow agent. This protects the grantee against intervening events (grantor's death, judgment liens, bankruptcy) between the escrow deposit and final delivery.

Citation: Black's Law Dictionary (11th ed., 2019), "relation back"

Source Quote:

Standard legal principle: Where a deed is deposited in escrow and subsequently delivered upon performance of the condition, the delivery relates back to the time of the original deposit.

Exam Relevance:

CA PLS: Yes -- California is an escrow state; directly relevant
PS: Moderate -- tested in conveyance contexts
FS: No

Related Doctrines: Escrow, Deed Delivery, Chain of Title

35. Deed Reformation

Category: Property & Conveyance

Definition: An equitable remedy whereby a court corrects errors in a deed to reflect the actual agreement of the parties. Courts will reform a deed when there is (1) mutual mistake -- both parties intended one thing but the deed says another, or (2) unilateral mistake coupled with fraud or inequitable conduct. The most common basis for reformation in surveying is an erroneous legal description -- incorrect bearings, distances, lot numbers, or metes and bounds that fail to close. The party seeking reformation must prove the error by clear and convincing evidence.

Citation: Restatement (Second) of Contracts Section 155; Black's Law Dictionary (11th ed., 2019), "reformation"

Source Quote:

Standard legal principle: Where, owing to mutual mistake of the parties or a unilateral mistake of one party combined with fraud or inequitable conduct of the other, the written instrument does not express the agreement of the parties, equity will reform the instrument to conform to the actual agreement.

Exam Relevance:

CA PLS: Yes -- legal description errors and deed analysis
PS: Yes -- deed interpretation
FS: No

Related Doctrines: Mutual Mistake, Legal Descriptions, Scrivener's Error, Quiet Title

36. Privity

Category: Property & Conveyance

Definition: In property law, privity refers to the legal relationship between parties to a contract or conveyance. Privity of contract means only those who were parties to the contract may bring suit. In surveying liability, the traditional rule limited claims to those in privity with the surveyor. Modern courts have expanded this, holding that surveyors may be liable to those they can reasonably foresee as relying on their work -- including subsequent purchasers, title companies, and contractors.

Citation: Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Section 16-3

Source Quote:

"In an action for damages, privity of contract means only those who were parties to the contract may bring suit. ... The newer court opinions in several states is this: Those in privity of contract and those to whom the surveyor can reasonably foresee as having a right to rely on the surveyor's work can sue for damages." -- Evidence & Procedures, Ch. 16

Exam Relevance:

CA PLS: Yes -- professional liability and ethics
PS: Yes -- professional practice
FS: No

Related Doctrines: Professional Liability, Negligence, Discovery Rule

37. Color of Title

Category: Property & Conveyance

Definition: A document or instrument that appears to give title to property but is actually defective in some way -- an invalid deed, a forged instrument, or a deed from a party who did not actually own the property. Color of title is significant in adverse possession claims: in many jurisdictions, a claimant with color of title may claim the entire area described in the defective instrument (not just the area actually occupied), and the statutory period for adverse possession may be shorter.

Citation: Wattles, Writing Legal Descriptions (1976), Ch. 10; Black's Law Dictionary (11th ed., 2019), "color of title"

Source Quote:

"Color of title under some statutes is not always essential but it does carry evidentiary value." -- Wattles, Ch. 10

Exam Relevance:

CA PLS: Yes -- adverse possession; CCP Section 322-325
PS: Yes -- adverse possession doctrine
FS: No

Related Doctrines: Adverse Possession, Claim of Right, Constructive Possession

38. Claim of Right

Category: Property & Conveyance

Definition: An element of adverse possession requiring the claimant to possess the property under a belief of ownership or right. It does not require that the claimant has a valid legal basis for the claim -- only that they possess the property as if they were the owner. Some jurisdictions distinguish between "claim of right" (good faith belief of ownership) and "hostile" possession (without the owner's permission). A claim of right establishes the possessor's state of mind as adverse rather than permissive.

Citation: Black's Law Dictionary (11th ed., 2019), "claim of right"

Source Quote:

Standard legal principle: A claim of right exists when the possessor enters and holds possession under a claim of ownership, as distinguished from possession in subordination to the true owner.

Exam Relevance:

CA PLS: Yes -- element of adverse possession under California law
PS: Yes -- adverse possession doctrine
FS: No

Related Doctrines: Adverse Possession, Color of Title, Hostile Possession

39. Tacking (Adverse Possession)

Category: Property & Conveyance

Definition: The joining together of consecutive periods of possession by different persons to satisfy the statutory period required for adverse possession. For tacking to apply, there must be privity between the successive possessors -- typically through a conveyance, descent, or devise. A new possessor can "tack" their period of possession onto their predecessor's period, provided there is no break in the chain of possession and there is a transfer of the claim between them.

Citation: Black's Law Dictionary (11th ed., 2019), "tacking"

Source Quote:

Standard legal principle: Successive occupants may tack their periods of possession to establish the requisite statutory period, provided there is privity of estate between the successive adverse possessors.

Exam Relevance:

CA PLS: Yes -- adverse possession questions
PS: Yes -- boundary law
FS: No

Related Doctrines: Adverse Possession, Privity, Color of Title, Statute of Limitations

40. Fixture Doctrine

Category: Property & Conveyance

Definition: Determines when personal property (chattel) becomes so affixed to real property that it legally becomes part of the realty. Courts commonly use the MARIA test: Method of annexation (how securely attached), Adaptation (whether customized for the property), Relationship of the parties (tenant vs. owner), Intention (the controlling factor -- did the person intend permanent attachment, judged by objective circumstances), and Agreement (written contracts may specify). Intention is the controlling factor.

Citation: Black's Law Dictionary (11th ed., 2019), "fixture"; Teaff v. Hewitt, 1 Ohio St. 511 (1853)

Source Quote:

Standard legal test from Teaff v. Hewitt (1853): Three factors determine whether an item is a fixture: (1) annexation to the realty, (2) adaptation to the use or purpose of the realty, and (3) intention of the party making the annexation.

Exam Relevance:

CA PLS: Moderate -- ALTA surveys and improvement surveys
PS: Yes -- property rights, ALTA/NSPS standards
FS: Low -- basic property concepts

Related Doctrines: Real Property vs. Personal Property, Trade Fixtures, ALTA/NSPS Standards

41. Quiet Title Action

Category: Property & Conveyance

Definition: A lawsuit filed to establish the plaintiff's ownership and to eliminate competing claims, clouds on title, or challenges to ownership. The court issues a judgment declaring the plaintiff's title valid and extinguishing adverse claims. Common triggers include: breaks in the chain of title, conflicting deeds, boundary disputes, adverse possession claims, tax sale irregularities, and title defects. For surveyors, quiet title actions often arise from boundary discrepancies and overlapping legal descriptions where survey evidence is critical.

Citation: Black's Law Dictionary (11th ed., 2019), "quiet title action"; Cal. Civ. Proc. Code Sections 760.010-760.060 (California)

Source Quote:

Standard legal definition: A quiet title action is a proceeding to establish the plaintiff's title to land by compelling the adverse claimant to establish a claim or be forever estopped from asserting it.

Exam Relevance:

CA PLS: Yes -- surveyors provide critical evidence in quiet title actions
PS: Yes -- boundary disputes and adverse possession
FS: No

Related Doctrines: Cloud on Title, Lis Pendens, Adverse Possession, Chain of Title

42. Remnant/Remainder Parcel

Category: Property & Conveyance

Definition: When a parent tract is subdivided by successive conveyances, the last remaining piece -- the remnant or remainder parcel -- is what's left after all described parcels have been carved out. The junior rights principle applies: the remainder belongs to the original owner and includes all excess or shortage in the parent tract. The remnant owner bears the risk of survey errors in prior conveyances, receiving whatever land is left regardless of what their deed may describe.

Citation: Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Section 3-16 (implied in senior/junior rights discussion)

Source Quote:

"The first deed (senior) has a right to all the land that is called for, and the seller (junior) owns the remainder." -- Evidence & Procedures, Ch. 3

Exam Relevance:

CA PLS: Yes -- subdivision and conveyance analysis
PS: Yes -- boundary law
FS: No

Related Doctrines: Senior/Junior Rights, Strip and Gore, Excess/Shortage

43. Doctrine of Worthier Title

Category: Property & Conveyance

Definition: Provides that when a grantor conveys a life estate to someone and a remainder to the grantor's own heirs, the remainder is treated as a reversion in the grantor rather than a remainder in the heirs. The rationale was that descent through bloodline (inheritance) was considered "worthier" than taking by purchase (deed or will). This doctrine has been abolished in most states and is largely of historical significance.

Citation: Black's Law Dictionary (11th ed., 2019), "worthier-title doctrine"; Restatement (Third) of Property: Wills & Other Donative Transfers Section 16.3

Source Quote:

Standard legal principle: Where a grantor conveys an interest in land and in the same instrument limits a remainder to his own heirs, the remainder is void and the grantor retains a reversion.

Exam Relevance:

CA PLS: Low -- California abolished this doctrine; historical knowledge only
PS: Low -- may appear as a distractor
FS: No

Related Doctrines: Rule in Shelley's Case, Future Interests, Life Estate, Reversion

44. Rule Against Perpetuities

Category: Property & Conveyance

Definition: "No interest in real property is valid unless it must vest, if at all, no later than 21 years after some life in being at the creation of the interest." Its purpose is to prevent property from being tied up in future interests indefinitely, ensuring land remains freely alienable. For surveyors, the rule is relevant when interpreting deed restrictions, conditions subsequent, and rights of reentry that purport to control land use far into the future. Many states have reformed or replaced the common-law rule with a fixed period (often 90 years).

Citation: John Chipman Gray, The Rule Against Perpetuities (4th ed., 1942); Uniform Statutory Rule Against Perpetuities (1990)

Source Quote:

"No interest is good unless it must vest, if at all, not later than twenty-one years after some life in being at the creation of the interest." -- Gray, The Rule Against Perpetuities

Exam Relevance:

CA PLS: Low -- Cal. Prob. Code Section 21205; general awareness sufficient
PS: Low -- may appear in estate/future interest context
FS: No

Related Doctrines: Future Interests, Fee Simple Determinable, Fee Simple Subject to Condition Subsequent

E. Recording and Notice#

45. Constructive Notice

Category: Recording & Notice

Definition: A legal fiction whereby a person is presumed to have knowledge of facts that are publicly recorded or reasonably discoverable, regardless of whether they actually knew. Recording a deed, mortgage, lien, or other instrument in the county recorder's office imparts constructive notice to all subsequent purchasers and encumbrancers. A buyer cannot claim ignorance of a prior interest that was properly recorded in the public records.

Citation: Black's Law Dictionary (11th ed., 2019), "constructive notice"; Restatement (Third) of Property: Servitudes Section 7.14

Source Quote:

Standard legal principle: The recording of an instrument affecting real property in the proper recording office is constructive notice of the contents of that instrument to all persons subsequently dealing with the property.

Exam Relevance:

CA PLS: Yes -- chain of title, recorded maps, SMA requirements
PS: Yes -- boundary law (recorded easements, senior/junior rights)
FS: No

Related Doctrines: Actual Notice, Inquiry Notice, Recording Acts, Bona Fide Purchaser

46. Recording Acts (Overview)

Category: Recording & Notice

Definition: State statutes that establish the legal system by which interests in real property are publicly recorded and that determine priority among competing claims to the same property. Every U.S. state has a recording act. Their purpose is to protect subsequent purchasers by providing a public record of ownership interests, establish priority rules when the same property is conveyed more than once, and give constructive notice. Three types exist: race, notice, and race-notice.

Citation: 14 Powell on Real Property Sections 82.01-82.03; Restatement (Third) of Property: Servitudes Section 7.14

Source Quote:

Standard legal framework: Recording acts create a system of public notice under which subsequent purchasers who comply with the recording requirements are protected against prior unrecorded interests.

Exam Relevance:

CA PLS: Yes -- California is a race-notice state; critical for deed priority
PS: Yes -- foundational conveyance concept
FS: No

Related Doctrines: Constructive Notice, Race Statute, Notice Statute, Race-Notice Statute

47. Race Statute

Category: Recording & Notice

Definition: Under a pure race statute, the first person to record their conveyance wins priority, regardless of whether they knew about a prior unrecorded conveyance. Good faith and lack of notice are irrelevant -- it is purely a race to the recorder's office. Only three states use pure race statutes: Delaware, North Carolina, and Louisiana. Race statutes are considered rare because they can protect a party who had actual knowledge of a prior conveyance.

Citation: N.C. Gen. Stat. Section 47-18; Black's Law Dictionary (11th ed., 2019), "race statute"

Source Quote:

Standard legal principle: Under a race statute, as between successive grantees of the same property, the one who first records prevails, regardless of notice.

Exam Relevance:

CA PLS: Low -- California uses race-notice; know the distinction
PS: Yes -- tested conceptually in comparing recording act types
FS: No

Related Doctrines: Recording Acts, Notice Statute, Race-Notice Statute

48. Notice Statute

Category: Recording & Notice

Definition: Under a notice statute, a subsequent bona fide purchaser who acquires an interest without notice of a prior unrecorded conveyance prevails over the prior grantee, even if the subsequent purchaser has not yet recorded. The key question is whether the subsequent purchaser had notice (actual, constructive, or inquiry) at the time of purchase. The subsequent purchaser does not need to record first to be protected.

Citation: Black's Law Dictionary (11th ed., 2019), "notice statute"; 14 Powell on Real Property Section 82.02[2]

Source Quote:

Standard legal principle: Under a notice statute, an unrecorded instrument is invalid as against any subsequent purchaser in good faith and for valuable consideration.

Exam Relevance:

CA PLS: Low -- California uses race-notice
PS: Yes -- tested conceptually
FS: No

Related Doctrines: Recording Acts, Race Statute, Race-Notice Statute, Bona Fide Purchaser

49. Race-Notice Statute

Category: Recording & Notice

Definition: Under a race-notice statute, a subsequent purchaser prevails over a prior grantee only if the subsequent purchaser (1) takes without notice of the prior conveyance AND (2) records first. Both conditions must be met. This is the most common type of recording act, used by roughly half the states including California (Cal. Civ. Code Section 1214). It combines the fairness of the notice requirement with the certainty incentive of requiring recording.

Citation: Cal. Civ. Code Section 1214; Black's Law Dictionary (11th ed., 2019), "race-notice statute"

Source Quote:

Cal. Civ. Code Section 1214: "Every conveyance of real property ... is void as against any subsequent purchaser or mortgagee of the same property, or any part thereof, in good faith and for a valuable consideration, whose conveyance is first duly recorded."

Exam Relevance:

CA PLS: Yes -- California's recording system; directly tested on priority disputes
PS: Yes -- the most common recording act type
FS: No

Related Doctrines: Recording Acts, Race Statute, Notice Statute, Bona Fide Purchaser

50. Lis Pendens

Category: Recording & Notice

Definition: Latin for "suit pending." A recorded notice that a lawsuit has been filed affecting title to or a claimed ownership interest in real property. Once recorded, it serves as constructive notice to all potential purchasers or lenders that the property's title is in dispute. Anyone who acquires an interest after lis pendens is recorded takes subject to the outcome of the lawsuit. It effectively places a "cloud on title" but does not prevent transfer -- it makes any transfer subject to the court's ruling.

Citation: Cal. Civ. Proc. Code Sections 405-405.61 (California); Black's Law Dictionary (11th ed., 2019), "lis pendens"

Source Quote:

Standard legal principle: A notice of lis pendens is designed to warn all persons that any rights or interests they may acquire during the pendency of the action are subject to its outcome.

Exam Relevance:

CA PLS: Yes -- surveyors encounter lis pendens in title reports
PS: Yes -- title examination and notice doctrines
FS: No

Related Doctrines: Constructive Notice, Quiet Title Action, Cloud on Title, Recording Acts

51. Marketable Title Acts

Category: Recording & Notice

Definition: State statutes that extinguish stale or dormant interests in real property after a statutory period (typically 30-40 years) to simplify title examination and improve marketability. They eliminate the need to search records back to the sovereign grant by cutting off ancient encumbrances -- dormant mortgages, unexercised options, abandoned easements, mineral interests -- that were never re-recorded within the statutory window. California's version: Cal. Civ. Code Sections 880.020-887.090.

Citation: Uniform Marketable Title Act (1990); Cal. Civ. Code Section 880.020 et seq.

Source Quote:

Standard legal principle: Marketable title acts operate to extinguish interests in land that are not re-recorded or asserted within the statutory period, simplifying title searches and removing ancient defects.

Exam Relevance:

CA PLS: Yes -- affects which easements and encumbrances remain enforceable
PS: Yes -- tested in context of ancient easements and title examination
FS: No

Related Doctrines: Recording Acts, Chain of Title, Quiet Title, Abandonment of Easements

F. Public Land Survey System (PLSS)#

52. Lost Corner

Category: PLSS

Definition: A corner whose original position cannot be determined by substantial evidence -- neither traces of the original marks, acceptable evidence, nor reliable testimony bearing upon the original position. It can be restored only by reference to one or more interdependent corners using proportionate measurement methods. The critical distinction from an obliterated corner is that no substantial evidence of the original position can be found.

Citation: BLM Manual of Surveying Instructions (2009), Section 7-2

Source Quote:

"A lost corner is one whose original position cannot be determined by substantial evidence, either from traces of the original marks or from acceptable evidence or reliable testimony that bears upon the original position, and whose location can be restored only by reference to one or more interdependent corners." -- BLM Manual, Section 7-2

Exam Relevance:

CA PLS: Yes -- PLSS corner restoration
PS: Yes -- fundamental PLSS concept
FS: Yes -- basic surveying

Related Doctrines: Obliterated Corner, Proportionate Measurement, Follow the Footsteps

53. Obliterated Corner

Category: PLSS

Definition: An existent corner where no remaining traces of the monument or its accessories exist at the corner's original position, but whose position has been perpetuated or may be recovered by substantial evidence from the acts or reliable testimony of interested landowners, competent surveyors, or other qualified local authorities, or by some acceptable record evidence. Distinguished from a lost corner in that the position can still be proven.

Citation: BLM Manual of Surveying Instructions (2009), Section 6-17

Source Quote:

"An obliterated corner is an existent corner where, at the corner's original position, there are no remaining traces of the monument or its accessories but whose position has been perpetuated, or the point for which may be recovered, by substantial evidence from the acts or reliable testimony of the interested landowners, competent surveyors, other qualified local authorities, or witnesses, or by some acceptable record evidence." -- BLM Manual, Section 6-17

Exam Relevance:

CA PLS: Yes -- corner restoration methods
PS: Yes -- fundamental PLSS concept
FS: Yes -- basic surveying

Related Doctrines: Lost Corner, Proportionate Measurement, Existent Corner

54. Proportionate Measurement

Category: PLSS

Definition: A measurement that gives equal relative weight to all parts of a line, distributing excess or deficiency between two existent corners so that each interval's share bears the same proportion to the whole difference as the record length of the interval bears to the whole record distance. The type of proportionate measurement used depends on the method of the original survey. It is the fundamental method for restoring lost corners in the PLSS.

Citation: BLM Manual of Surveying Instructions (2009), Section 7-7

Source Quote:

"A proportionate measurement is one that gives equal relative weight to all parts of the line based upon a process conforming to the method followed in the original survey. The excess or deficiency between two existent corners is so distributed that the amount given to each interval bears the same proportion to the whole difference as the record length of the interval bears to the whole record distance." -- BLM Manual, Section 7-7

Exam Relevance:

CA PLS: Yes -- corner restoration calculations
PS: Yes -- fundamental PLSS concept
FS: Yes -- basic surveying calculations

Related Doctrines: Lost Corner, Single Proportionate, Double Proportionate, Follow the Footsteps

55. Single Proportionate Measurement

Category: PLSS

Definition: A proportionate measurement made on a single line between two identified corners to determine one or more positions on that line. The positions of the two identified corners control the direction. Also called a "two-way" proportion (north-and-south or east-and-west). Used for quarter-section corners on the line between two section corners, and all corners on standard parallels.

Citation: BLM Manual of Surveying Instructions (2009), Section 7-16

Source Quote:

"The term 'single proportionate measurement' is applied to a new measurement made on a line to determine one or more positions on that line. By single proportionate measurement the position of two identified corners controls the direction of that line. The method is sometimes referred to as a 'two-way' proportion." -- BLM Manual, Section 7-16

Exam Relevance:

CA PLS: Yes -- corner restoration methods
PS: Yes -- PLSS computation
FS: Yes -- basic calculation

Related Doctrines: Double Proportionate Measurement, Lost Corner, Proportionate Measurement

56. Double Proportionate Measurement

Category: PLSS

Definition: A proportionate measurement made between four known corners, two each on intersecting meridional and latitudinal lines, to locate a lost corner at the intersection. Record directions are disregarded except where supplemental evidence exists. Corners north and south control latitudinal position; corners east and west control longitudinal position. Also called a "four-way" proportion. Used to restore lost standard township, section, and quarter-section corners not on a line.

Citation: BLM Manual of Surveying Instructions (2009), Section 7-8

Source Quote:

"The term 'double proportionate measurement' is applied to a new measurement made between four known corners, two each on intersecting meridional and latitudinal lines, for the purpose of relating the cardinal equivalents intersection to both." -- BLM Manual, Section 7-8

"In effect, by double proportionate measurement the record directions are disregarded, excepting only where there is some acceptable supplemental survey record, some physical evidence, or testimony that may be brought into the control." -- BLM Manual, Section 7-8

Exam Relevance:

CA PLS: Yes -- corner restoration calculations
PS: Yes -- PLSS computation
FS: Yes -- basic calculation

Related Doctrines: Single Proportionate Measurement, Lost Corner, Cardinal Equivalent

G. Easements, Dedication, and Public Rights#

57. Dedication (Common Law vs. Statutory)

Category: Easements & Public Rights

Definition: The giving of land or rights in land to the public. Common-law dedication requires four elements: a capable donor, identifiable land, intent to dedicate (which may be inferred from conduct), and acceptance. Common-law dedications operate by way of estoppel. Statutory dedication must comply with the letter of the law -- typically requiring signed and acknowledged written offers and formal acceptance -- and operates by way of grant. A completed dedication, once accepted, is irrevocable. Dedication of roadways on maps is a form of easement.

Citation: Robillard & Wilson, Evidence and Procedures for Boundary Location (6th ed., 2011), Sections 13-16 through 13-19; Wattles, Writing Legal Descriptions (1976), Ch. 9, p. 9.6-9.8; Clark, Treatise on Law of Surveying and Boundaries (1922), Chapter XX

Source Quote:

"Dedication is the giving of land, either as a fee title or as an easement right, by its owner for public, charitable, semipublic, or utility use. ... Common-law dedications operate by way of estoppel, whereas a statutory dedication operates by way of a grant." -- Evidence & Procedures, Ch. 13

"Any dedication of land, whether it be for parks, streets, alleys, walks, bridges, wharves, etc., expresses an intent for the land to be accepted and used for that public purpose." -- Wattles, Ch. 9

"A dedication once made and accepted is irrevocable." -- Clark, Section 550

Exam Relevance:

CA PLS: Yes -- subdivision and SMA questions
PS: Yes -- public rights doctrine
FS: No

Related Doctrines: Estoppel, Vacation, Easement, Fee Simple

58. Vacation of Streets/Easements

Category: Easements & Public Rights

Definition: The legal process by which a government entity relinquishes the public's interest in a street, alley, road right-of-way, or public easement, returning the underlying land to private ownership. Vacation only abandons public rights; private rights remain intact. Upon vacation, title to the vacated area typically reverts to the abutting property owners (usually to the centerline of the vacated way). The process requires a finding that the right-of-way is unnecessary for present or prospective public use.

Citation: Wattles, Writing Legal Descriptions (1976), Ch. 9, p. 9.10-9.11; Cal. Sts. & Hy. Code Sections 8300-8363 (California)

Source Quote:

"Any vacation or abandonment of publicly-held land (whether acquired by an easement deed, a fee deed or dedication on a map) only abandons the public rights; private rights remain intact." -- Wattles, Ch. 9

Exam Relevance:

CA PLS: Yes -- vacated streets affect legal descriptions and subdivision maps
PS: Yes -- public rights-of-way and easement termination
FS: No

Related Doctrines: Dedication, Abandonment, Reversion, Centerline Presumption, Abutting Owner Rights

59. Eminent Domain / Condemnation

Category: Easements & Public Rights

Definition: The inherent power of the government (or authorized entities like utilities) to take private property for public use upon payment of just compensation, as guaranteed by the Fifth Amendment. "Condemnation" is the legal proceeding through which eminent domain is exercised. The surveyor's role is critical: preparing legal descriptions of the property or easement to be taken, creating right-of-way maps, performing boundary surveys, and serving as expert witnesses. Partial takings require surveying both the take area and the remainder.

Citation: U.S. Const. amend. V; Cal. Civ. Proc. Code Section 1230.010 et seq. (California)

Source Quote:

U.S. Constitution, Fifth Amendment: "...nor shall private property be taken for public use, without just compensation."

Exam Relevance:

CA PLS: Yes -- right-of-way maps and legal descriptions for condemnation
PS: Yes -- surveyor's role and legal descriptions
FS: Moderate -- basic concept may appear in professional practice

Related Doctrines: Just Compensation, Inverse Condemnation, Regulatory Taking, Police Power

60. Laches

Category: Easements & Public Rights

Definition: An equitable defense that bars a party from asserting a claim when they have unreasonably delayed in bringing the claim, and the delay has prejudiced the opposing party. Unlike a statute of limitations (which sets a fixed time period), laches is a flexible doctrine based on the circumstances -- the length of delay, the reasons for it, and the harm caused. In boundary law, laches may prevent a property owner from challenging an encroachment or boundary line that they knew about but failed to contest for an unreasonable period.

Citation: Black's Law Dictionary (11th ed., 2019), "laches"

Source Quote:

Standard legal principle: Laches is such neglect or omission to assert a right, taken in conjunction with lapse of time and other circumstances causing prejudice to an adverse party, as will operate as a bar in equity.

Exam Relevance:

CA PLS: Yes -- defense in boundary disputes
PS: Yes -- boundary law and equity
FS: No

Related Doctrines: Statute of Limitations, Acquiescence, Estoppel, Adverse Possession

H. Specialized Doctrines#

61. Doctrine of Repose

Category: Specialized

Definition: The principle that long-established boundaries should not be disturbed, even if a new survey reveals them to be technically incorrect. It is embodied in doctrines like boundary by acquiescence, practical location, and agreed boundaries, all of which function as "rules of repose" to quiet titles and prevent endless boundary litigation. The policy rationale is that society benefits from stability in land ownership. Separately, statutes of repose in professional liability set an absolute deadline (typically 6-10 years) for claims against surveyors, running from the date of the survey regardless of when the error is discovered.

Citation: Brown's Boundary Control and Legal Principles (7th ed.), Ch. 1; Black's Law Dictionary (11th ed., 2019), "repose, statute of"

Source Quote:

Standard legal principle: The doctrine of repose reflects the policy that there comes a time when boundaries become fixed by the passage of time and the actions of parties, and reopening them would cause more harm than the technical correction would remedy.

Exam Relevance:

CA PLS: Yes -- fundamental principle underlying acquiescence and practical location
PS: Yes -- core boundary law principle
FS: No

Related Doctrines: Boundary by Acquiescence, Practical Location, Agreed Boundary, Adverse Possession, Statute of Limitations

62. Cy Pres Doctrine

Category: Specialized

Definition: French for "so near" or "as near as possible." An equitable doctrine allowing a court to modify the terms of a charitable trust, dedication, or easement when the original purpose becomes impossible, impracticable, or illegal, by substituting a purpose as close to the original intent as possible. In surveying contexts, cy pres applies to public dedications where the dedicated purpose can no longer be fulfilled and to conservation easements whose specific purpose has become impracticable. The court must find a "general charitable intent" in the original instrument.

Citation: Restatement (Third) of Trusts Section 67; Black's Law Dictionary (11th ed., 2019), "cy pres"

Source Quote:

Standard legal principle: If a charitable trust or dedication cannot be carried out as originally intended, a court may apply the cy pres doctrine to direct the property to a purpose as near as possible to the original charitable intent.

Exam Relevance:

CA PLS: Moderate -- public dedications, conservation easements
PS: Low -- may appear in easement/dedication context
FS: No

Related Doctrines: Doctrine of Approximation, Public Dedication, Conservation Easements, Vacation

63. Doctrine of Approximation (Equitable Deviation)

Category: Specialized

Definition: Allows a court to modify the administrative terms or means of carrying out a trust or dedication when changed circumstances make the original method impracticable, while the general purpose remains achievable. Unlike cy pres, which modifies the charitable purpose itself, approximation modifies only how the purpose is carried out. It applies to both charitable and private trusts (cy pres is limited to charitable trusts). In property law, relevant when conditions in deed restrictions or dedications become impracticable to fulfill literally.

Citation: Restatement (Third) of Trusts Section 66; Black's Law Dictionary (11th ed., 2019), "equitable deviation"

Source Quote:

Standard legal principle: Where the specific means of carrying out a trust or dedication become impracticable due to changed circumstances, a court may authorize deviation from the administrative terms while preserving the general purpose.

Exam Relevance:

CA PLS: Low -- niche doctrine; may appear alongside cy pres
PS: Low -- rarely tested
FS: No

Related Doctrines: Cy Pres Doctrine, Changed Conditions, Restrictive Covenants, Deed Restrictions

Cross-Reference Index#

If studying...	Also review...
Adverse Possession	Prescriptive Easements, Acquiescence, Tacking, Color of Title, Claim of Right, Statute of Limitations, Laches
Water Boundaries	Accretion, Reliction, Avulsion, OHWM, Thalweg, Meander Lines, Ambulatory Boundaries, Public Trust, Riparian/Littoral
Deed Interpretation	Four Corners, Parol Evidence, Patent/Latent Ambiguity, Extrinsic/Intrinsic Evidence, Construction vs. Interpretation, General/Specific Intent, Construction Against Grantor
Unwritten Rights	Acquiescence, Practical Location, Boundary by Agreement, Estoppel, Adverse Possession, Prescriptive Easements, Statute of Frauds
Recording & Priority	Recording Acts, Race/Notice/Race-Notice, Constructive Notice, BFP, Lis Pendens, Marketable Title, Senior/Junior Rights
PLSS Corners	Lost Corner, Obliterated Corner, Proportionate Measurement, Single/Double Proportionate, Follow the Footsteps, Original vs. Retracement
Easements	Prescriptive, Merger, Dedication, Vacation, Privity, Cy Pres
Surveyor Liability	Privity, Laches, Doctrine of Repose, Follow the Footsteps, Original vs. Retracement

Sources: Brown's Boundary Control and Legal Principles (Robillard & Wilson); Evidence and Procedures for Boundary Location (6th ed., 2011); Wattles, Writing Legal Descriptions (1976); BLM Manual of Surveying Instructions (2009); Clark, Treatise on Law of Surveying and Boundaries (1922); Black's Law Dictionary (11th ed., 2019); Restatement (Third) of Property.