Notwithstanding any other provision of law to the contrary, any member retired under RSA 102:17 or 18 and who upon retirement elected an option under RSA 102:16, or whose designated representative is receiving an allowance under RSA 102:16 shall continue to receive benefits under such election.
RSA 102:16-b
1975, 195:2, eff. Aug. 1, 1975.