There are many laws that govern townships, but the two main laws dealing with township administration and governance are:
General township laws, the Revised Statutes of 1846, R.S. of 1846 (Chapter 41 of the Michigan Compiled Laws)
Charter Township Act (Chapter 42 of the Michigan Compiled Laws)
All Michigan laws are available to the public on the free, searchable Michigan Legislative Website. The laws can be searched by keyword, or Michigan Compiled Laws (MCL) number, such as "41.721" or "42.8".
All current legislation, including House and Senate bills, can be accessed and tracked as well.