(1) Subject to the requirements of each retirement system, a vested member may purchase additional service credit. Members may purchase one full year of additional service for each five full years of membership service in the retirement system. A member eligible to purchase additional service may purchase months of service totaling 11 months or less.

(2) The board will include a member's additional service when calculating the amount of a benefit, but not for determining early or service retirement eligibility, except in the following cases:

(a) additional service purchased into PERS is required to be included when determining a member's early retirement reduction factor; and

(b) additional service purchased into SRS is required to be used when determining a member's retirement eligibility.

(3) A retired member who returns to active membership in the system from which they retired may purchase one-for-five service after at least 12 months of active service. The amount of one-for-five service which may be purchased will be based on the member's total membership service in the member's current retirement system.

History: 19-2-403, MCA; IMP, 19-3-513, 19-3-902, 19-3-904, 19-3-906, 19-5-409, 19-6-804, 19-7-804, 19-8-904, 19-9-411, 19-13-405, MCA; NEW, 1990 MAR p. 994A, Eff. 7/1/90; AMD, 1991 MAR p. 510, Eff. 4/26/91; AMD, 1991 MAR p. 2216, Eff. 11/15/91; AMD, 1995 MAR p. 1033, Eff. 6/16/95; AMD, 1999 MAR p. 1504, Eff. 7/2/99; AMD & TRANS, from ARM 2.43.432, 2008 MAR p. 2467, Eff. 12/1/08; AMD, 2013 MAR p. 2238, Eff. 11/28/13