R.I. Gen. Laws § 23-20.11-10: Local regulation.

Notwithstanding any other provision of law, the local governmental units of this state may neither enact nor enforce any ordinance or other local law or regulation conflicting with, or preempted by, any provision of this act or with any policy of this state expressed by this act, whether that policy be expressed by inclusion of a provision in the act or by exclusion of that subject from the act.