Michigan Compiled Laws, Chapter 45. Counties § 45.564

(a) Upon a majority vote and the affirmative recommendation of the county manager or elected county executive, and following a public hearing, the board may consolidate departments completely or in part, or may transfer a function from 1 department to another;  or the board may, upon the affirmative vote of 2/3 of its members and following a public hearing, consolidate departments completely or in part, or may transfer a function from 1 department to another.

(b) Create additional departments.

(c) Require the county manager or elected county executive to serve as director of a department.