76.69. An officer whose status changes from full-time to part-time during his period of work may elect to:
(1) continue to participate in the plan according to section 76.68; or
(2) withdraw from his agreement on the conditions determined in section 76.88.
A full-time officer who becomes a part-time officer after his period of leave is deemed to remain a full-time officer for the purposes of calculating the percentage of his salary during the period of work following the period of leave.