46 CFR §153.285
- (a)When cargo lines serving different tanks enter a pumproom and connect to the same pump:
- (1)Each cargo line must have a stop valve within the line;
- (2)The valve must be before the cargo line joins the other lines or pump; and
- (3)The valve must be within the pumproom.
- (b)The valve in paragraph (a) of this section is required in addition to any valve required under § 153.283(b).