Mich. Comp. Laws § 168.509cc

Sec. 509cc. (1) If a registration is challenged under this act and the challenged voter does not respond in the manner provided in this act, the registration record of that voter remains challenged and election officials shall not allow the challenged voter to vote until he or she answers the grounds of the challenge in the manner provided in this act. If a registration is challenged under this act and an election official determines, based upon the response of the challenged voter, that the voter is qualified to vote, the election official shall allow the voter to vote and the clerk shall remove the identification as challenged from the registration record of that voter. (2) If a clerk does not independently determine that a challenged voter is qualified to vote or if the challenged voter does not respond to the challenge or fails to prove in his or her response to the challenge that he or she is qualified to vote during the period beginning on the date of the notice of challenge under this act and ending on the first business day immediately following the second November general election that is held after the date of the notice, the clerk shall cancel the registration of the voter and remove his or her name from the registration record of the city or township.