MSHA - Code of Federal Regulations - 30 CFR 75.1727
30 CFR § 75.1727
Drive belts.
(a) Drive belts shall not be shifted while in motion unless the
machines are provided with mechanical shifters.
(b) Belt dressing shall not be applied while belts are in motion
except where it can be applied without endangering a person.
[38 FR 4976, Feb. 23, 1973]
