For purposes of determining the benefits of an air rescue firefighter, for credited service earned prior to July 1, 1992, the benefits shall be calculated pursuant to § 3-12C-1106 and for credited service after June 30, 1992, the benefits shall be calculated pursuant to § 3-12C-1107 . Source: SL 1992, ch 34 , § 3; SDCL § 3-12-129 ; SL 2019, ch 22 , § 1.