Mich. Comp. Laws § 53.147

Sec. 7. All books, records, indexes and memoranda of the systems hereby authorized shall at all reasonable hours be open for inspection by any person lawfully entitled to have access thereto under such reasonable rules and regulations and subject to such fees and charges as may be from time to time established by the abstractor, subject to such limitations and restrictions, if any, as may be from time to time made by the board of supervisors.