Okla. Stat. tit. 11, § 11-44-107.1: Nonconforming use - Termination - Exception

A. The lawful nonconforming use of a building, structure or

premises as such existed at the time of the adoption and recording

of any ordinance affecting it, may be continued, although such use

does not conform with the provisions of such ordinance. The

municipality may provide for the termination of lawful nonconforming

uses either by specifying the period or periods within which such

use shall be required to cease, or by designating conditions or

circumstances which shall cause such use to cease, or by providing a

formula or formulas whereby the compulsory termination of a

nonconforming use shall be so fixed as to allow a reasonable period

for the amortization of the investment in the nonconformance.

B. Regulations and restrictions affecting the termination of

nonconforming uses as authorized by this section may be adopted or

amended by the municipality only after notice and hearing as

provided in Sections 43-104 and 43-105 of Title 11 of the Oklahoma

Statutes.

C. Nothing in this section shall be construed to permit or

authorize municipalities to terminate lawful nonconforming uses

consisting of oil and/or gas activity.

D. Nothing in this section shall be construed to permit or

authorize municipalities to terminate a lawfully erected

nonconforming sign unless such sign is altered in a manner that

increases the degree of nonconformity or is abandoned for a period

of more than two (2) years.