Okla. Stat. tit. 11, § 11-21-204: New boundaries of the municipality

All portions of land within the original boundaries of the

municipality shall continue to be within its limits and subject to

its governmental authority. The governing body may, in the interest

of the public or the owners of such land, detach any territory

embraced within its original limits in the manner provided by law

for the detachment of municipal territory.