46 U.S.C. § 70131
In this subchapter:
(2) Security zone.— The term “security zone” means a security zone, established by the Commandant of the Coast Guard or the Commandant’s designee pursuant to section 1 of title II of the Act of June 15, 1917 (50 U.S.C. 191) or section 7(b) of the Ports and Waterways Safety Act (33 U.S.C. 1226(b)), for a vessel carrying especially hazardous cargo when such vessel—
(Added Pub. L. 111–281, title VIII, § 828(a), , 124 Stat. 3005; amended Pub. L. 111–330, § 1(16), , 124 Stat. 3570.)
2010—Pub. L. 111–330 amended Pub. L. 111–281, § 828(a), which enacted this section.
Pub. L. 111–330, § 1, , 124 Stat. 3569, provided that the amendment made by section 1(16) is effective with the enactment of Pub. L. 111–281.