Okla. Stat. tit. 69, § 69-1301: Application of article to state and certain cities and

counties.

The provisions of this article, except those provisions

authorizing the use of special assessments, shall extend to the

State of Oklahoma through the Commission, and to every city in this

state having a population of two thousand (2,000) or more, according

to the last preceding Federal Decennial Census, whether such city is

or shall hereafter be operating under a charter form of government

or under general law. The provisions of this article authorizing

the use of special assessments shall extend to very county of the

state having a population of forty-two thousand (42,000) or more, in

which there is located a city having a population in excess of

twenty-seven thousand (27,000) as shown by the last preceding

Federal Decennial Census, and the provisions of this article

authorizing the use of special assessments shall extend to every

city in this state having a population in excess of twenty-seven

thousand (27,000) as shown by the last preceding Federal Decennial

Census.