Okla. Stat. tit. 16, § 16-74

- Thirty-year possession as deemed equivalent to filing notice.

(a) Any person claiming an interest in land may preserve and

keep effective such interest by filing for record during the thirty-

year period immediately following the effective date of the root of

title of the person whose record title would otherwise be

marketable, a notice in writing, duly verified by oath, setting

forth the nature of the claim. No disability or lack of knowledge

of any kind on the part of anyone shall suspend the running of said

thirty-year period. Such notice may be filed for record by the

Oklahoma Statutes - Title 16. Conveyances Page 28

claimant or by any other person acting on behalf of any claimant who

is

(1) under a disability,

(2) unable to assert a claim on his own behalf, or

(3) one of a class, but whose identity cannot be established or

is uncertain at the time of filing such notice of claim for record.

(b) If the same record owner of any possessory interest in land

has been in possession of such land continuously for a period of

thirty (30) years or more, during which period no title transaction

with respect to such interest appears of record in his chain of

title, and no notice has been filed by him or on his behalf as

provided in subsection (a), and such possession continues to the

time when marketability is being determined, such period of

possession shall be deemed equivalent to the filing of the notice

immediately preceding the termination of the thirty-year period

described in subsection (a).