Mich. Comp. Laws § 8.22: Acts and joint resolutions; binding after enrollment, certificate, signatures.

Sec. 2.

Hereafter, at the close of each session of the legislature, the secretary of state shall cause to be bound in like manner the enrolled acts and joint resolutions of the legislature, which shall become laws under the constitution of this state, and shall certify, under his hand and the seal of the state, on the frontispiece of the volume, that said volume contains the whole of the original acts and joint resolutions, as enrolled by the clerks, signed by the secretary of the senate and the clerk of the house of representatives, and approved by the governor, or which may have become laws under the constitution of this state, without his signature or approval.