Mich. Comp. Laws § 124.613

Sec. 13. Any incorporating municipality or a municipality otherwise granted taxing authority under state law may levy a tax on all of the taxable property within the limits of the political subdivision, and appropriate, grant, or contribute the proceeds of the tax to an authority for the purposes of this act or to provide sufficient money to fulfill its contractual obligation to the authority, which tax shall be within charter, statutory, and constitutional limitations.