Michigan Compiled Laws, Chapter 16. Executive Organization § 16.603

Sec. 503. The governor may appoint the head of any principal department not otherwise elected or appointed. Prior to assuming his duties as head of a department, the appointee shall have full access to all departments and agencies and records thereof relevant to his prospective duties for the purpose of formulating the internal organization of the department. During the period before the transfer of any powers, duties and functions in accordance with this act, existing departments and agencies shall continue to exercise their powers, duties and functions.