99 pages on this wiki. A charter township is a form of municipal government in Michigan. Unlike civil townships, which are a statutory unit of government in Michigan, charter townships are incorporated municipalities and are granted special privileges such as wide-range exemptions from annexation.overnment Edit. Legislative authority in the charter township government is exercised by a township board composed of seven members. The seven members include the supervisor, the township clerk, the township treasurer, and 4 trustees. All members must be eligible to vote in elections and reside within the township.