Mich. Comp. Laws § 408.965

Sec. 5. (1) If an employee is transferred to a separate division, entity, or location, but remains employed by the same employer, the employee retains all earned sick time that was accrued at the prior division, entity, or location and may use all accrued earned sick time as provided in section 4. If an employee separates from employment and is rehired by the same employer not more than 2 months after the separation, the employer shall reinstate previously accrued, unused earned sick time and shall allow the reinstated employee to use that earned sick time and accrue additional earned sick time upon reinstatement. This subsection does not apply if an employer pays an employee the value of the employee's unused accrued earned sick time at the time of a transfer or separation. (2) If a different employer succeeds or takes the place of an existing employer, the successor employer assumes the responsibility for the earned sick time rights that employees who remain employed by the successor employer accrued under the original employer. Those employees are entitled to use earned sick time previously accrued on the terms provided in this act. This subsection does not apply if an employer pays an employee the value of the employee's unused accrued earned sick time at the time of a succession. (3) This act does not require an employer to provide financial or other reimbursement to an employee for accrued earned sick time that was not used upon the employee's termination, resignation, retirement, or other separation from employment.