Modifying certain provisions relating to the Minneapolis teachers +retirement fund association; authorizing and providing for the purchase of prior+ service credit in the Minneapolis (TRA) by a certain person formerly employed+ by special school district #1, Minneapolis as a long call reserve +teacher and school social worker and currently employed by Hennepin county for +certain uncredited teaching service, specifying certain required special +school district balance payment requirements; repealing a certain prior +provision providing for the purchase of prior service credit for uncredited +teaching service periods by the same employee (mk)