For any foundation member, the term, reduction age, means the age at which the sum of the foundation member's age and credited service equals a number as follows:
(1) For Class A credited service, an age not less than fifty-five and at which the sum of the foundation member's age and credited service equals eighty-five;(2) For Class B credited service as a justice, judge, or magistrate judge, an age not less than fifty-five and at which the sum of the foundation member's age and credited service equals eighty; and(3) For Class B credited service other than as a justice, judge, or magistrate judge, an age not less than forty-five and at which the sum of the foundation member's age and credited service equals seventy-five.SL 2016, ch 32, §29; SDCL § 3-12-89.7; SL 2019, ch 22, §1.