It shall be a condition to the issuance of any license by this municipality pursuant to this code or any of the ordinances of this municipality hereinafter referred to and amended, that all real estate taxes and special assessments levied against the premises licensed shall be paid prior to the last date when payable without penalty. Upon receipt of evidence that the taxes or special assessments levied against any licensed premises have become delinquent, the Manager-Clerk shall notify the licensee of the delinquency and that all licenses issued for the premises under the circumstances hereinafter described shall be terminated and canceled 30 days after date of the notice, and unless the taxes and special assessments are paid and the County Treasurer’s receipt for the same delivered to the City Manager-Clerk within that 30-day period, the license described in the notice shall upon termination of the 30-day period be deemed cancelled and terminated; provided, however, that no license shall be cancelled or terminated during the time in which any judicial proceeding is pending challenging the validity of the amount of the tax or special assessment in question.
(`74 Code, § 400:63)