Mo. Rev. Stat. § 155.030: Increase in assessment for delinquent report.

In case the report from any airline company required by section 155.020 is not received by May first of the year in which it is due, the state tax commission, at its discretion, may increase by four percent the total assessed value of the flight equipment of the airline company as is determined by the commission under the provisions of section 155.040.