Mich. Comp. Laws § 42.9

Sec. 9. The township supervisor, township clerk, township treasurer, justices of the peace, and constables in each charter township shall have and perform the duties and functions required of such officers by state law. The township board may, by resolution, upon the recommendation of the supervisor, or of the township superintendent if one shall be appointed, create such additional officers as may be necessary to administer the affairs of the township government, or may combine any administrative offices in any manner not inconsistent with state law, and prescribe the duties thereof. No creation of any additional administrative office or combination thereof shall abolish the offices of township clerk or township treasurer nor diminish any of the duties or responsibilities of those offices which are prescribed by state law.