Okla. Stat. tit. 11, § 11-21-115: Inclusion of territory in public records or notices –

Presumption of validity.

In the event any territory has been included within public

records or public notices describing the corporate boundaries of a

municipality for purposes of an election or ad valorem tax

assessment of the municipality for five (5) consecutive years, there

shall be a rebuttable presumption that the territory is situated

within the municipality. The public records and public notices

shall be evidence of the jurisdiction of the municipality over the

territory in all suits by or against the municipality.