Okla. Stat. tit. 19 § 864.1
For the purpose of cooperating with the State of Oklahoma in conserving the natural resources of the state and in promoting the health, safety, peace, morals, and general welfare of the people of the state, there may be provided in any county of the State of Oklahoma having within its boundaries a city having a population of one hundred eighty thousand (180,000) or more, according to the last preceding Federal Decennial Census or any future Federal Census, a city or cities and county electrical examining and appeals board, in the manner herein provided, and for the purpose there is hereby authorized to be created in each of such counties a joint city-county electrical examining and appeals board with the respective powers and duties as set out in this act; provided, however, this act shall not apply to any county containing any such city if that city includes territory in more than four counties.
Okla. Stat. tit. 19, § 864.1