Mich. Comp. Laws § 168.518
Whenever a new township shall be organized, the persons designated to act as inspectors for the first election to be held therein shall constitute a board of registration for the purpose of making the first registration of qualified electors therein. Said board shall be authorized to procure the necessary books or files and forms to conduct such registration in accordance with the provisions of this act. Subsequent to the election, the records shall be delivered to the persons elected to the office of clerk of the township. At least 10 days' public notice shall be given of the time and place for holding the registration. Such notice shall be given by posting written or printed notices in at least 5 of the most conspicuous places in said township, city or village, or by publication in a newspaper of general circulation therein. Whenever a new city is incorporated from the territory of a township, the registration records of the portion of the township incorporated as a city shall constitute the registration records of the newly incorporated city. Township registration records shall be available and used in connection with the election on the adoption of the charter of any new city or village and for the first election of such city's or village's officers.
Whenever any territory of a township is annexed to a city, the clerk of the township from which the territory was detached shall, not less than 5 days prior to the effective date of the annexation, forward to the clerk of the city to which the territory was annexed all of the current registration records of the registered electors residing in the annexed territory. Such records shall thereafter be a part of the registration records of such city and the electors whose registration records were so transferred shall be registered electors of such city.
All such transfers of registration shall be accompanied by a statement signed by the township clerk certifying that all of the current registrations of persons residing within the annexed or incorporated area according to his records are included therein.
MCL 168.518