30 CFR § 57.14161 Makeshift couplings.
Couplings used on underground rail equipment shall be designed for that
equipment, except that makeshift couplings may be used to move disabled rail
equipment for repairs if no hazard to persons is created.
U.S. Department of Labor | Mine Safety and Health Administration (MSHA) | 1100 Wilson Boulevard, 21st Floor | Arlington, VA 22209-3939 www.msha.gov | Telephone: (202) 693-9400 | Fax-on-demand: (202) 693-9401