Michigan Compiled Laws, Chapter 338. Professions and Occupations § 338.3737

(a) The responsibility of the PEO to pay wages to covered employees; to withhold, collect, report and remit payroll-related and unemployment taxes; and, to the extent the PEO has assumed responsibility in the professional employer agreement, to make payments for employee benefits for covered employees. For purposes of this subdivision, wages do not include any obligation between a client and a covered employee for payments beyond, or in addition to, the covered employee's salary, draw, or regular rate of pay, including bonuses, commissions, severance pay, deferred compensation, profit sharing, or vacation, sick, or other paid time off pay, unless the PEO has expressly agreed to assume liability for those payments in the professional employer agreement.

(b) The hiring, disciplining, and termination by the PEO of a covered employee, as necessary to fulfill the PEO's responsibilities under this act and the professional employer agreement. The client may also hire, discipline, and terminate a covered employee.

(c) The responsibility of the client and the PEO to comply with the worker's disability compensation act of 1969, 1969 PA 317, MCL 418.101 to 418.941.