Okla. Stat. tit. 19, § 19-869.4

The jurisdictional area of a lake area planning commission may

include all or part of the unincorporated area of any county or

counties authorized to create such a planning commission, provided

that the jurisdictional area shall be limited to a three-mile

perimeter from the normal shoreline elevation of the upstream

terminal port or turnaround where navigation ends, or any reservoir

or reservoirs constructed by the Bureau of Reclamation, the U.S.

Army Corps of Engineers or the Grand River Dam Authority, regardless

of the population of the county or counties or the cities or towns

therein. In the event that the three-mile perimeter described above

includes portions of two or more counties, the counties may

cooperate in a joint lake area planning commission; provided, that

no lake area planning commission may establish or maintain any

jurisdictional area within any county or counties without a

resolution of participation from the board of county commissioners

of the county or counties.

In the event that all or part of an incorporated city or town

lies within the three-mile perimeter, as described above, the

incorporated areas may elect to come under the jurisdiction of the

lake area planning commission. In the event that an incorporated

area elects to come within the jurisdiction of a lake area planning

commission, the commission shall become the planning commission or

zoning commission, or both, for the incorporated area or areas in

their entirety, without regard for the three-mile perimeter from the

normal shoreline elevation.

In counties where a metropolitan area planning commission

exists, the board of county commissioners may utilize that

commission in forming a lake area planning commission.

In no event shall the boundaries of any statutorily authorized

planning commissions overlap, and where a situation of overlap does

occur, the jurisdictional question shall be settled on the basis of

prior jurisdiction.