(a) Inspection. Shovels and draglines shall be inspected at the beginning of each shift, and such inspection shall include all mechanical equipment. Electrical equipment shall be regularly inspected by a qualified person.
(b) Maintenance. Where mechanical shovels and draglines are used at night, all lights shall be inspected before darkness, defective globes replaced, and defective wiring repaired.
(c) Oiling. Mechanical equipment on shovels and draglines shall not be cleaned or oiled while in motion, except where so designed or modified as to make lubrication while in motion safe.
(d) Steps, etc. All steps, handrails, grab irons, and floors shall be kept free from grease and extraneous material.
(e) Unauthorized person. No unauthorized person shall be allowed on any power shovel or dragline.
(f) Passage of persons. No person shall pass under the boom or bucket of a shovel or dragline while in operation.
(g) Warning. The operator of a shovel or dragline shall sound a warning prior to placing the machine in operation.