Okla. Stat. tit. 11, § 11-37-215: Right of property owner to institute action in district

court.

Any property owner shall have the right to institute an action

in the district court in the county in which the situs of the

municipal government is located at any time not later than fifteen

(15) days after the action of the municipal governing body in

adopting and approving the plans, profiles, specifications,

estimates and assessment plat, to contest such action. Any suit

instituted after the expiration of the fifteen (15) days shall not

be maintained to question the plans, profiles, specifications,

estimates or assessment plat, and the property owners liable for

assessment shall be deemed to have waived all objections thereto.