Okla. Stat. tit. 60, § 60-49.19

DURATION; AMENDMENT BY COURT ACTION.

A. An environmental covenant is perpetual unless it is:

1. By its terms limited to a specific duration or terminated by

the occurrence of a specific event;

2. Terminated by consent pursuant to Section 10 of this act;

3. Terminated pursuant to subsection B of this section;

Oklahoma Statutes - Title 60. Property Page 29

4. Terminated by foreclosure of an interest that has priority

over the environmental covenant; or

5. Terminated or modified in an eminent domain proceeding, but

only if:

a. the agency that signed the covenant is a party to the

proceeding,

b. all persons identified in subsections A and B of

Section 10 of this act are given notice of the

pendency of the proceeding, and

c. the court determines, after hearing, that the

termination or modification will not adversely affect

human health or the environment.

B. If the agency that signed an environmental covenant has

determined that the intended benefits of the covenant can no longer

be realized, a court, under the doctrine of changed circumstances,

in an action in which all persons identified in subsections A and B

of Section 10 of this act have been given notice, may terminate the

covenant or reduce its burden on the real property subject to the

covenant. The agency’s determination or its failure to make a

determination upon request is subject to review pursuant to the

Administrative Procedures Act.

C. Except as otherwise provided in subsections A and B of this

section, an environmental covenant may not be extinguished, limited,

or impaired through issuance of a tax deed, foreclosure of a tax

lien, or application of the doctrine of adverse possession,

prescription, abandonment, waiver, lack of enforcement, or

acquiescence, or a similar doctrine.

D. An environmental covenant may not be extinguished, limited,

or impaired by application of the provisions of Sections 71 through

85 of Title 16 of the Oklahoma Statutes or the Uniform Unclaimed

Property Act.