security zone
(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) 33 U.S.C. 1226(b) ), for a vessel carrying especially hazardous cargo when such vessel— (A) enters, or operates within, the internal waters of the United States and the territorial sea of the United States; or (B) transfers such cargo or residue in any port or place, under the jurisdiction of the United States, within the territorial sea of the United States or the internal waters of the United States.