Okla. Stat. tit. 11 § 37-213
Protests shall be heard and considered at the next regular meeting of the governing body following the expiration of the fifteen-day period after the last publication of the resolution of necessity. The hearing may be continued from time to time. The finding of the governing body as to the sufficiency or insufficiency of the protest or petition shall be conclusive and binding for all purposes and against all persons. The governing body shall have the power to hear any protest or petition and compel the attendance of witnesses under oath to determine the sufficiency thereof. If sufficient protests are filed as to any one or more noncontiguous areas, the same shall be eliminated from the proceedings, but the other areas shall not be affected thereby. No action or suit to question the findings of the governing body on the sufficiency of the protests or petition shall be commenced later than fifteen (15) days after the finding.
Okla. Stat. tit. 11, § 37-213