(A) The City Clerk shall, within 60 days after the completion of each local or special public improvement, compile the actual cost thereof and certify the same to the Commission.
(B) Should the assessment roll prove insufficient to pay for the improvement and related costs of the project for which it was levied, the Commission may make an additional pro rata assessment which shall not exceed 25% of the original assessment.
(C) Should the assessment prove larger than necessary by less than 5%, the Commission may place the excess in the City Treasurer; if more than 5%, the excess shall be refunded pro rata to those persons making the payments. Interest and penalties shall be in the same amounts and collected in the same manner as set forth in § 9 of the city’s Charter.
(1991 Code, § 1.189)