R.I. Gen. Laws § 42-64.14-18
Except as otherwise provided herein, any provisions of any special law and part of any special law and all ordinances and parts of ordinances pertaining to development within the district that are inconsistent with the provisions of this chapter shall be inoperative and cease to be effective. The provisions of this chapter shall be deemed to provide an exclusive, additional, alternative, and complete method for the doing of the things authorized hereby and shall be deemed and construed to be supplemental and additional to, and not in derogation of, powers conferred upon the commission by law and on the city by its charter; provided, however, that insofar as the express provisions of this chapter are inconsistent with the provisions of any general or special law, administrative order or regulation, or ordinance of the city, the provisions of this chapter shall be controlling; provided, however, to the extent of any inconsistency or conflict between this chapter and chapter 24.6 of title 45, the provisions of chapter 24.6 of title 45 shall be controlling.
R.I. Gen. Laws § 42-64.14-18