200.2. A worker is allowed to board a locomotive or mechanical haulage equipment if the worker stands on a foot-step, at the back of the locomotive that is not connected to a mine car, or at the back of the mechanical haulage equipment, if the following conditions are met:
(1) the locomotive or mine car is equipped with handles and a foot-step allowing the worker to stand;
(2) the clearance above the top of the foot-step is at least 2 m (6.6 ft);
(3) the foot-step is used by a maximum of 2 workers.
For the purposes of the first paragraph, the back is determined by the direction opposite the direction of travel.