§ 371. Optional retirement at age fifty-five; alternative plan. a. Any
member of the police and fire retirement system, who, while a member of
the state employees' retirement system, elected to contribute on a basis
of retirement at age fifty-five pursuant to section seventy-one of this
chapter and who did not withdraw such election as therein provided
shall, contribute to the police and fire retirement system at the rate
prescribed by such section, and if such member retires under the
provisions of such section his retirement allowance shall be computed
according to the provisions of such section.