R.I. Gen. Laws § 45-40.1-8: Interlocal contracts.

Any one or more public agencies may contract with any one or more other public agencies to perform any governmental service, activity, or undertaking which any of the public agencies entering into the contract is authorized by law to perform; provided, that the contract is authorized by the governing body of each party to the contract. The contract shall state fully the purposes, powers, rights, objectives, and responsibilities of the contracting parties.