Okla. Stat. tit. 11, § 11-36-215: Hearing - Correction and confirmation of apportionment

Any person, firm or corporation may, at or prior to the hearing

on the apportionment, file objections in writing against the

validity of the assessment roll or amount of the proposed

assessment, specifically setting forth the nature thereof, and shall

have full opportunity to be heard thereon. The governing body shall

adjudicate and determine the objections and may make such order as

may be just and proper. Any objections to the regularity of the

proceedings with reference to the making of the improvement or the

validity or the amount of any assessment shall be deemed waived

unless presented at the time and in the manner herein specified. At

the hearing on the apportionment, or any adjournment thereof, the

municipal governing body may review and correct the apportionment

and assessment, and raise or lower the same as to any lots or tracts

of land, as it shall deem just. The governing body by resolution

shall confirm the apportionment and assessment as so revised and

corrected by it.