Okla. Stat. tit. 11, § 11-2-101: Incorporation of a municipality

A. Any community of people residing in compact form may become

incorporated as a town in the manner provided in Sections 3-101

through 3-107 of this title. If the resident population is one

thousand (1,000) or more, a town or community of people residing in

compact form may become incorporated as a city in the manner

provided in Sections 4-101 through 4-107 of this title.

B. Any community which has operated as an incorporated

municipality for twenty-five (25) years or more but which does not

have any evidence of its articles of incorporation shall be presumed

to have incorporated as the statutory form of municipal government

under which it has operated. Such community may file with the

Secretary of State any historical evidence of its incorporation.

Notice of said filing shall be published one time. If no action

challenging the presumption of incorporation is brought within sixty

(60) days after publication of the notice of filing, the presumption

of incorporation shall be conclusive.