The additional survivor protection option granted under § 3-12C-1001 is hereby extended to all current contributing members of the system for a period of three months commencing October 1, 1990, and ending December 31, 1990. In no event may the additional survivor protection be made available to a terminated vested member or to a member receiving a retirement benefit from the system. However, the additional survivor protection option may not be so extended again at any time after June 30, 2004. Source: SL 1982, ch 32 , § 7; SL 1986, ch 39 ; SL 1990, ch 39 ; SL 2004, ch 41 , § 2; SL 2017, ch 27 , § 16; SDCL § 3-12-104.1 ; SL 2019, ch 22 , § 1.