Michigan Compiled Laws, Chapter 400. Social Services § 400.254

(a) Annual leave accumulated before October 1, 1978, under a formal county policy shall be credited to the officer's annual leave balance. This leave may be used during the officer's service. When the officer separates from service as an officer, the time credited under this subdivision shall be subtracted from the officer's annual leave balance before payment by this state of the unused annual leave.

(b) Sick leave accumulated before October 1, 1978, under a formal county policy shall be credited to the officer's sick leave balance. This leave may be used during the officer's service and shall be included in the sick leave balance for purposes of long-term disability insurance computation. Upon retirement or death or separation from service as an officer, the time credited under this subdivision shall be subtracted from the officer's sick leave balance before payment by this state of a prorated amount for unused sick leave.

(c) For purposes of longevity computation, a person shall not be considered to have begun service as an officer before October 1, 1978.

(d) For purposes of determining earned sick leave, annual leave, and longevity, a biweekly work period shall consist of the standard number of hours during a standard 2-week period worked by the employees of the probate court of the county in which the officer serves.