30 CFR § 57.11038 Entering a manway.
Before entering a manway where persons may be working or traveling, a warning
shall be given by the person entering the manway and acknowledged by any
person present in the manway.
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