46 CFR §174.020
A barge need not comply with § 174.015 and subparts C and E of part 170 of this chapter if it has the following characteristics:
- (a)The weather deck is watertight.
- (b)The barge's hull proportions fall within any one of the ratios in categories (A) through (D) in Table 174.020.
- (c)The maximum cargo height is 30 feet (9.25 meters) or a value equal to the depth of the barge amidships, whichever is less.