46 CFR §154.471

1. (a)The cargo tank support system must be designed:
   1. (1)For the loads in § 154.406(a);
   2. (2)To not exceed the allowable stress under this part at a static angle of heel of 30°;
   3. (3)To withstand a collision force equal to at least one-half the weight of the cargo tank and cargo from forward and one-quarter the weight of the cargo tank and cargo from aft; and
   4. (4)For the largest resulting acceleration in Figure 1, including rotational and translation effects.
2. (b)The cargo tank support design loads in paragraph (a) of this section may be analyzed separately.