Mich. Comp. Laws § 125.946a
A municipality may issue bonds or notes from time to time in its discretion to finance the undertaking of any project authorized by this act including, but not limited to, the payment of principal and interest on any advances or loans made for surveys and plans for any project authorized by this act. The bonds or notes shall be made payable, as to both principal and interest, solely from the income, proceeds, revenues and funds of the municipality derived from or held in connection with its undertaking and carrying out of any projects under this act. Payment of the bonds or notes, both as to principal and interest, may be further secured by a pledge of any loan, grant, or contribution due or to become due from the federal government or other source, in aid of any projects of the municipality under this act. Bonds or notes issued under this section shall not constitute an indebtedness within the meaning of any constitutional, statutory, or charter debt limitation or restriction, and shall not be subject to the provisions of any charter relating to the authorization, issuance, or sale of bonds or notes and may be issued without vote of the electors of the municipality. Bonds or notes issued under the provisions of this section are declared to be issued for an essential public and governmental purpose, and, together with interest on the bonds and notes and income on the bonds and notes, shall be exempted from all taxes. Bonds or notes issued under this section are subject to the revised municipal finance act, 2001 PA 34, MCL 141.2101 to 141.2821.
MCL 125.946a