Mich. Comp. Laws § 397.354

Sec. 4. If the proposition shall be carried by a majority of those voting at the election, in each township, and the respective election boards shall so certify, the respective township boards shall meet together in the township casting the largest vote at such election and shall pass a joint resolution, which shall be recorded in the minutes of the clerk of each board, canvassing the returns of the elections, and shall formally consolidate the township libraries of the 2 townships.