Okla. Stat. tit. 19, § 19-1211: Annexation of additional area

Area outside the boundaries of any district which can be served

by the facilities of the district may be annexed to such district.

A petition for annexation signed by at least twenty-five percent

(25%) of the registered voters in the most recent election may be

filed with the county clerk, verified by the county election board

and then presented to the board of county commissioners, which shall

give the legal description of the area which the petitioners propose

to be annexed to such district, and shall state:

1. The name of the district to which annexation is desired;

2. That such area is without an adequate system; and

3. That annexation to the district will be conducive to and

will promote the public health, safety, and welfare of residents in

the area.