Mich. Comp. Laws § 333.2442
Before adoption of a regulation the local health department shall give notice of a public hearing and offer any person an opportunity to present data, views, and arguments. The notice shall be given not less than 10 days before the public hearing and not less than 20 days before adoption of the regulation. The notice shall include the time and place of the public hearing and a statement of the terms or substance of the proposed regulation or a description of the subjects and issues involved and the proposed effective date of the regulation. The notice shall be published in a manner calculated to give notice to persons likely to be affected by the proposed regulation. Methods which may be employed, depending on the circumstances, include publication of the notice in a newspaper of general circulation in the jurisdiction, or when appropriate, in a trade, industry, governmental, or professional publication.
MCL 333.2442