(1) A member who terminates reporting unit service before 60 years of age for a reason other than the member’s retirement or death, who does not withdraw accumulated contributions standing to the member’s credit in the reserve for employee contributions and the reserve for member investment plan, and who has or maintains in effect 10 or more years of credited service shall be entitled to a deferred vested service retirement allowance computed pursuant to section 84 based upon the last year of credited service of the member’s final average compensation period. Upon or after 60 years of age, entitlement of the member’s deferred vested service retirement allowance shall begin the first day of the calendar month next following the deferred member’s written application filed with the retirement board on forms furnished by the board. The deferred member’s entitlement to a deferred vested service retirement allowance based on prior service or contributory membership service, or both, shall be forfeited if the deferred member withdraws from the retirement system the member’s accumulated contributions unless the service is reinstated as provided in section 66. A member who meets all of the qualifications of this subsection, has 30 or more years of credited service, and leaves service before the member’s fifty-fifth birthday for a reason other than retirement or death shall be entitled to a deferred vested service retirement allowance at 55 years of age.

  (2) If a member, before terminating reporting unit services, selects the option provided in section 85(1)(b), but dies before the effective date of the member’s deferred vested service retirement allowance, the option provided in section 85(1)(b) and selected by the deferred member shall be paid to the retirement allowance beneficiary, at the time the deceased deferred member would have otherwise been eligible to begin receiving the deferred vested service retirement allowance.