R.I. Gen. Laws § 45-22.1-5: Cooperation with joint municipal planning commission — Municipalities and others.

Every joint municipal planning commission shall encourage the cooperation of the participating municipalities in matters which concern the integrity of the comprehensive plan or maps prepared by the commission, and, as an aid toward coordination, all municipalities and public officials shall, upon request, furnish to the joint municipal planning commission within a reasonable time the available maps, plans, reports, statistical, or other information the commission may require for its work.