Be it enacted by the Senate and House of Representatives in General Court assembled, and by the authority of the same, as follows:
Notwithstanding the provisions of section thirteen of chapter eighty of the
General Laws or any other general or special law to the contrary, the city of
Gloucester is hereby authorized to establish interest on sewer betterment
projects completed after nineteen hundred and eighty-nine and assessed under
the provisions of said chapter eighty at a percentage or fixed fee per unit
basis to be determined by said city.