Mich. Comp. Laws § 207.909

Sec. 9. The assessor of each qualified local governmental unit in which there is a qualified facility with respect to which 1 or more certificates have been issued and are in force shall determine annually as of December 31 the taxable value of each qualified facility separately, having the benefit of a certificate and upon receipt of notice of the filing of an application for the issuance of a certificate, shall determine and furnish to the local legislative body the taxable value of the property to which the application pertains.