Mich. Comp. Laws § 487.2139

Sec. 19. (1) A license issued under this article shall expire on September 30 of each year unless earlier suspended, surrendered, or revoked under this act. A licensee may renew a license for a 12-month period by submitting a complete application that shows continued compliance with this act, in a form prescribed by the commissioner, and paying the license renewal fee to the commissioner. The licensee shall submit a renewal application under this subsection on or before August 1 and the commissioner shall proceed in the manner described in sections 15(1) and 16. (2) Before October 1, 2006, the commissioner may issue a license to an applicant under this article that is for a period longer than 12 months and that expires on September 30, 2007.