Section R. 408.17234 - Jacking and blockingRule 7234.
(1) A vehicle being serviced, adjusted or repaired while the motor is running shall have 2 wheels chocked from front and rear or parking brake set or other vehicle restraint controls provided.(2) An employee shall not place his body under a vehicle supported only by a jack, overhead hoist or chain fall. Safety stands having a yield point of not less than 1 1/2 times its rated capacity shall be used to support the vehicle.(3) A jack shall not be used to lift more than its rated capacity.Mich. Admin. Code R. 408.17234