Okla. Stat. tit. 11, § 11-36-207: Right of property owner to institute action in district

court - Waiver of objections.

Any property owner, or other person interested in the proposed

improvement, shall have the right to institute an action in the

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