R.I. Gen. Laws § 42-28.1-2: Eligibility for plan.

Any full-time member of any state, city, town police force, the sheriffs unit, the Rhode Island marshals’ unit, the Rhode Island capitol police force, park police and conservation officer units of the division of enforcement of the department of environmental management, and the state fire marshal and deputy state fire marshals of the Rhode Island division of fire safety shall be eligible for the plan established in this chapter provided he or she accumulates the requisite number of points under the schedule set forth in § 42-28.1-3.