Versions of See prior versions of a law on LawServer 2024 Michigan Laws 339.5946 – Operation of boiler; valid inspection certificate required; pressure restrictions; violation; penalties 2023 Michigan Laws 339.5946 – Operation of boiler; valid inspection certificate required; pressure restrictions; violation; penalties 2022 Michigan Laws 339.5946 – Operation of boiler; valid inspection certificate required; pressure restrictions; violation; penalties 2020 Michigan Laws 339.5946 – Operation of boiler; valid inspection certificate required; pressure restrictions; violation; penalties