Michigan Compiled Laws, Chapter 45. Counties § 45.558

(a) Supervise, direct, and control the functions of the departments of the county except those headed by elected officials.

(b) Coordinate the various activities of the county and unify the management of its affairs.

(c) Enforce all orders, rules, and ordinances of the board and laws of this state required to be enforced by his or her office.

(d) Not less than 90 days before the next succeeding fiscal year, prepare and submit to the board a recommended annual county budget and work program, and administer the expenditure of funds in accordance with appropriations.  An elected officer or county road commissioner may appear before the board as to his or her own budget.  Not less than once each year the appointed manager or county executive shall submit to the board a proposed long-range capital improvement program and capital budget.

(e) Appoint, supervise, and, at pleasure, remove heads of departments other than elected officials.  The appointment of heads of departments shall require the concurrence of a majority of the county board of commissioners.

(f) Submit recommendations to the board for the efficient conduct of county business.

(g) Report to the board on the affairs of the county and its needs, and advise the board not less than every 3 months on the financial condition of the county.

(h) Perform other duties and activities as the board directs.

(i) Audit all claims which are chargeable against the county.  A warrant shall not be drawn for a claim, nor shall the claim be paid, until the claim has been audited by the county executive, the county manager, or a designated representative of the county executive or county manager.