46 CFR §153.932

1. (a)The master shall ensure that each person wear a face mask or tight-fitting goggles for eye protection against splashing or spraying liquids if that person is:
   1. (1)Sampling cargo;
   2. (2)Transferring cargo;
   3. (3)Making or breaking a cargo hose connection;
   4. (4)Gauging a cargo tank; or
   5. (5)Opening a cargo tank by opening a Butterworth hatch, ullage hatch, cargo tank hatch, or similar opening.
2. (b)The master shall ensure that each person wear a face mask or tight-fitting goggles for eye protection against splashing or spraying liquids if the person is:
   1. (1)In the area of the deck where the cargo tanks, cargo piping, and cargo pumprooms are located while a cargo transfer is taking place; or
   2. (2)In a cargo pumproom, an enclosed space adjacent to a cargo tank, or a space containing part of a cargo containment system.
3. (c)The master shall ensure that each person in paragraphs (a) and (b) of this section wear any additional protective clothing the master believes necessary to protect the person from the cargo's hazards.