Mich. Comp. Laws § 124.601

Sec. 1. As used in this act: (a) "Authority" means an authority incorporated under this act. (b) "Emergency services" means fire protection services, emergency medical services, police protection, and any other emergency health or safety services designated in the articles of incorporation of an authority. (c) "Incorporating municipality" means a municipality that becomes part of a new authority in the manner provided in section 2, or joins an existing authority in the manner provided in section 3. (d) "Municipal emergency service" means an emergency service performed by a municipality, rather than by an authority. (e) "Municipality" means a county, city, village, or township.