Section R. 408.15443 - Operating rules; riding vehiclesRule 5443.
(1) A riding vehicle shall not carry a passenger other than the operator.(2) The source of power to an attachment of a riding vehicle shall be disengaged when the attachment is not in use or is being transported.(3) When a riding vehicle is left unattended, the steps listed in R 408.15415(4)(b) shall be followed.(4) Riding groundskeeping equipment shall not be operated up or down a slope of more than 26 degrees or move across the face of a slope of more than 17 degrees.(5) A deviation from the requirement of subrule (4) may be obtained from the department of labor by presenting special design or modification criteria which shows an ability to perform safely on a specific slope of a greater degree without slipping or tipping.Mich. Admin. Code R. 408.15443