Okla. Stat. tit. 11, § 11-20-101: Review of wards after each federal census

A. As soon as practicable following each federal census, the

municipal governing body shall review the wards and ward boundaries

of the municipality. The governing body shall change the boundaries

or number of wards, if necessary, in the manner provided by this

article, so that the wards are formed of compact and contiguous

territory and are substantially equal in population.

B. The municipal governing body, to the extent practicable,

shall not subdivide precincts established by a county election board

in establishing ward or council boundaries.