Michigan Compiled Laws, Chapters 220 to 244 General Highway Law § 224.32

Sec. 32. (1) An authorized employee of any state agency, department, board or commission, certified public accountant, or firm of certified public accounts conducting an audit under this act shall have access to, and may examine, all books, accounts, reports, vouchers, correspondence files, and other records, as well as bank accounts, moneys, or other property of a road commission.

(2) An officer of a county road commission, upon demand of persons authorized under this act, shall produce all books, accounts, reports, vouchers, correspondence files, and other records, as well as bank accounts, moneys, or other property of the county road commission under audit or investigation, and shall truthfully answer all questions related thereto.