Michigan Compiled Laws, Chapter 333. Health § 333.2422

(a) Create a city health department pursuant to a plan developed under section 2424.  1

(b) Join with the county or district in which the city is located to create a district health department pursuant to section 2415  2 and a plan developed under section 2424.

(c) Decline to exercise the options in subdivision (a) or (b), in which case the local health department otherwise having jurisdiction in the county in which the city is located, pursuant to a plan developed under section 2424, shall assume the powers and duties of a local health department in the city.