Okla. Stat. tit. 19, § 19-866.2: City and county powers

In any county of the state authorized to avail itself of the

provisions of this act and form with a city located therein a

cooperative planning commission, such city is hereby empowered to

adopt, amend, extend, add to or carry out a comprehensive plan for

such city under the authority of existing statutes and laws and in

addition is hereby authorized to establish a housing code in

accordance with the provisions hereinafter set forth in this act,

and it may also perform any additional urban planning which is

needed including, but not limited to, surveys, land use studies,

urban renewal plans, conservation plans, technical service and other

planning work.

Such county is hereby granted authority to establish zoning

regulations, a building code and construction codes and a housing

code in accordance with the provisions of this act for all the area

located within three (3) miles of such municipality or within one-

fourth (1/4) mile of any state or federal highway located anywhere

in the county, or within one-half (1/2) mile of any water supply or

reservoir owned by the municipality, excluding, however, any

incorporated area, except as hereinafter provided; and further

provided that such county is hereby granted authority to adopt,

amend, extend, add to or carry out within the jurisdictional limits

as provided by this act, excluding, however, any incorporated area

and any unincorporated town which has been platted for more than ten

(10) years, except as hereinafter provided, all additional elements

of a comprehensive plan including, but not limited to, plans for

major streets and highways and other elements of water, rail, air

and land transportation plans, public facilities plans, capital

improvement programs, uniform regulations for land subdivision and

for the improvements located thereon, building line regulations,

urban renewal plans and conservation plans. However, the provisions

of this section shall not be construed to prohibit a municipality in

a metropolitan area planning commission from creating its own

separate planning commission to act within the boundary of the

municipality. In every county of this state having an upstream

terminal port and turnaround where navigation ends, or in any county

containing all or any part of a reservoir or reservoirs constructed

by the Bureau of Reclamation, the United States Army Corps of

Engineers or by the Grand River Dam Authority, such county is hereby

granted authority, at the discretion of the board of county

commissioners, to establish zoning regulations, a building code and

construction codes and a housing code in accordance with the

provisions of this act for all or any part of the unincorporated

area within the county, and further provided that such county is

hereby granted authority to adopt, amend, extend, add to or carry

out, throughout the unincorporated area of the county, additional

elements of a comprehensive plan including, but not limited to,

plans for major streets and highways and other elements of water,

rail, air and land transportation plans, public facilities plans,

capital improvement programs, uniform regulations for land

subdivision and for the improvements located thereon, building line

regulations and conservation plans.