In addition to the retirement system established under the provisions of chapter 21 of this title, any municipality may accept this chapter in the manner stated in § 45-21-4. Withdrawal from the system is in the same manner as stated in § 45-21-5 subject to the provisions of § 45-21.4-3.
Optional retirement for police and firefighters
R.I. Gen. Laws § 45-21.2-3., under Chapter 45-21.2 Optional Retirement for Members of Police Force and Firefighters.
R.I. Gen. Laws § 45-21.2-3.