33 CFR §157.500

1. (a)The purpose of this subpart is to establish mandatory safety and operational requirements to reduce environmental damage resulting from the discharge of animal fat or vegetable oil.
2. (b)This subpart applies to each tank vessel specified in § 157.01 of this part that—
   1. (1)Is 5,000 gross tons or more;
   2. (2)Carries animal fat or vegetable oil in bulk as cargo or cargo residue; and
   3. (3)Is not equipped with a double hull meeting § 157.10d of this part, or an equivalent to the requirements of § 157.10d, but required to be equipped with a double hull at a date set forth in 46 U.S.C. 3703a (b)(3) and (c)(3).