Notwithstanding the provisions of sections 7-264, 7-378 and 7-378a and any other public or special act or charter or ordinance or resolution which limits or imposes conditions on the renewal of temporary notes to finance sanitary sewers issued in anticipation of the receipt of the proceeds of bond issues, any town, as defined in said section 7-378, which does not have an operating municipal sanitary sewerage system connected to a treatment plant, may renew such temporary notes for a period of not more than four years from the date of the original notes if the town promptly applies all project grant payments toward project costs or toward payment of such temporary notes as the same shall become due and payable or deposits such grants in trust for such purposes, and if the original notes were issued on or before June 30, 1982. No temporary notes issued or renewed pursuant to this section shall mature later than one year from the date the sanitary sewers financed by such notes are placed in operation.