Michigan Compiled Laws, Chapter 38. Civil Service and Retirement § 38.1374

Sec. 74. (1) A member of this retirement system after May 31, 1976, who does not meet the requirements of section 73,  1 and who enters active duty with the armed forces, may elect to receive service credit for not more than 5 years of active duty upon request and payment to the retirement system of an amount equal to 5% of the member's full-time or equated full-time compensation earned in the school fiscal year immediately before the school fiscal year in which payment is made multiplied by the years of service that the member elects to purchase up to the maximum.

(2) For the purposes of computing payment under this section, the compensation amount used shall not be less than the highest school fiscal year compensation previously earned by a member. If the compensation amount used for computing payment under this section exceeds the member's final average compensation determined at the time of retirement, the payment required under this section shall be recomputed using the member's final average compensation and a refund shall be made based upon the recomputation.

(3) Service shall not be credited if it is or would be credited under any other federal, state, or local publicly supported retirement system, but this restriction shall not apply to a person who has acquired or will acquire retirement eligibility under the federal government for service in the reserve.

(4) Service shall not be credited under this section until the member has accumulated 10 years of full-time or equated full-time service credit performed under this act or former acts.