R.I. Gen. Laws § 45-39.1-4: Organization.

Notwithstanding any provision of law, charter, or ordinance, to the contrary not later than July 1, 2010, each municipal water supply shall be organized, operated, and accounted for as an enterprise fund; provided, however, that the requirements of this section shall not be deemed to abrogate or impair any agreement, decision, rate, or order in effect on July 1, 2009.