Rhode Island General Laws Title 45. Towns and Cities § 45-21-10. Information furnished as to members--Classification

(1) Group 1. Laborers, mechanics, and workers engaged in duties requiring principally physical exertion; and clerical, administrative, professional, and technical workers engaged in duties requiring principally mental exertion;

(2) Group 2. Members of the fire department of the participating municipality and members of the police department of the participating municipality;

(3) Or in any other group which may be recommended by the actuary on the basis of the service and mortality experience and approved by the retirement board.