Mich. Comp. Laws § 408.820

Sec. 20. (1) A person shall not smoke or carry lighted tobacco in any form in a passenger elevator in any building, structure, or premises in this state. A person who has control or management of any building, structure, or premises equipped with a passenger elevator shall not permit smoking or the carrying of lighted tobacco in any form in the elevator. (2) The owner, occupant, firm, or corporation that has control or management of a building, structure, or premises equipped with 1 or more passenger elevators shall do both of the following: (a) Post in each elevator a sign reading, "Smoking prohibited by law — violators subject to fine of $50.00 or 90 days' imprisonment". (b) Provide and locate near each elevator entrance at each floor a noncombustible receptacle approved by the bureau of fire services created in section 1b of the fire prevention code, 1941 PA 207, MCL 29.1b, for the proper disposal of cigar and cigarette stubs, pipe ash, or lighted tobacco in any form.