Jefferson County, retirement system, pension board authorized to establish procedures for the election of board members number four and five, notices of annual meetings, provide tuition reimbursement to its employees, contributions of members, Secs. 45-37-123.20, 45-37-123.21, 45-37-123.22, 45-37-123.23, 45-37-123.28, 45-37-123.29, 45-37-123.51, 45-37-123.83, 45-37-123.84, 45-37-123.100, 45-37-123.101, 45-37-123.102, 45-37-123.103, 45-37-123.104, 45-37-123.106, 45-37-123.194 am'd.