Section R. 408.12220 - Restrictions of useRule 2220.
(1) Except as provided in subrule (2) of this rule, a tractor shall not be used in an environment that is likely to contain an ignitable mixture of gases, vapors, dusts, or fibers.(2) A tractor used in a hazardous environment, as noted in subrule (1) of this rule, shall be equipped and labeled as prescribed in the National Fire Protection Association Standard NFPA 505, "Type Designations, Areas of Use, Maintenance, and Operation of Powered Industrial Trucks," 1975 edition, as adopted by reference in R 408.42202.(3) A tractor with an internal combustion engine shall not be operated in a building or enclosed area unless ventilation is provided which reduces the concentration of toxic gases below the maximum allowable limits as set by the Michigan Occupational Safety and Health Administration (MIOSHA) Standards.Mich. Admin. Code R. 408.12220