In case the Treasurer, pursuant to the provisions of Section 150, shall report as delinquent any assessment or part thereof, the Council shall certify the same to the Assessor who shall reassess on the next annual City tax roll in a column headed special assessments, the sum so delinquent with interest and penalty to March first of such year and an additional penalty of five percent of such total amount and when so reassessed upon such tax roll, shall be collected in all respects as provided for the collection of City taxes, except from and after the thirty-first day of July of the year of such reassessment and until March first of the following year, there shall be added a penalty of one percent for each month or fraction thereof that the same remains unpaid. Unpaid special assessments reassessed upon a City tax roll shall be returned to the County Treasurer for collection, at the same time and in the same manner as City taxes.