Mich. Comp. Laws § 121.5
If on the vote being canvassed in each city, village or township, the result is determined to be in favor of the incorporation, the city clerk in the case of cities, the village clerk in the case of villages, and the township clerk in the case of townships, each shall file with the secretary of state and with the county clerk of the county in which the city, village or township is located, a certified copy of the resolution of their legislative body indicating its desire to become a part of the authority, a certified copy of the notice of election at which the question was submitted to the electors, and a certified copy of the canvassing resolution showing that the incorporation proposition was approved by a majority of the electors voting thereon, which resolution shall also give the number of votes cast on the proposition and the number cast for and against the same. From the date of the filing, the authority shall be deemed to be duly and legally incorporated under the provisions of this act if the total current state equalized valuation of such units of government so filing shall be $200,000,000.00 or more. If the electors of 1 or more cities, villages or townships vote against becoming a part of the authority, such fact shall not defeat the incorporation if the incorporation was approved by the electors of any 2 or more remaining cities, villages or townships having a current state equalized valuation of $200,000,000.00 or more; but the remaining cities, villages or townships shall constitute the boundaries of the authority, and a part thereof, if the legislative bodies of the remaining units of government, by resolution, approve the incorporation. Copies of the resolutions shall be filed in the office of the secretary of state and the county clerk of the county in which the units of government are situated. The incorporated authority shall then be known and designated as "The charter water authority of the (name cities, villages and townships becoming a part thereof), county (or counties) of ...................., Michigan" unless the governing body of the authority adopts a distinctive name for the authority, and files it in the office of the secretary of state.
MCL 121.5