Michigan Compiled Laws, Chapter 207. Taxation § 207.566

Sec. 16. (1) Unless earlier revoked as provided in section 15,  1 an industrial facilities exemption certificate shall remain in force and effect for a period to be determined by the legislative body of the local governmental unit and commencing with its effective date and ending on the December 31 next following not more than 12 years after the completion of the facility with respect to both the real property component and the personal property component of the facility. The date of issuance of a certificate of occupancy, if one is required, by appropriate municipal authority shall be the date of completion of the facility.

(2) In the case of an application which was not filed within 12 months after the commencement of the restoration, replacement, or construction of the facility but was filed within the succeeding 12-month period as provided in section 9(2)(a),  2 the industrial facilities exemption certificate, unless earlier revoked as provided in section 15, shall remain in force and effect for a period commencing with its effective date and ending on the December 31 next following not more than 11 years after completion of the facility with respect to both the real property component and the personal property component of the facility. The date of issuance of a certificate of occupancy, if one is required, by appropriate municipal authority shall be the date of completion of the facility. This subsection shall not apply for certificates issued after December 31, 1983.

(3) In the case of an application filed pursuant to section 9(4), an industrial facilities exemption certificate, unless earlier revoked as provided in section 15, shall remain in force and effect for a period to be determined by the legislative body of the local governmental unit and commencing on the effective date of the certificate and ending on the December 31 next following not more than 11 years after the effective date of the certificate.