1. Short title This Act may be cited as the Maritime Border Security Review Act . 2. Definitions In this Act: (1) Appropriate congressional committees The term appropriate congressional committees means— (A) the Committee on Homeland Security of the House of Representatives; (B) the Committee on Transportation and Infrastructure of the House of Representatives; (C) the Committee on Homeland Security and Government Affairs of the Senate; and (D) the Committee on Commerce, Science, and Transportation of the Senate. (2) Maritime border The term maritime border means— (A) the transit zone; and (B) the borders and territorial waters of Puerto Rico and the United States Virgin Islands. (3) Transit zone The term transit zone has the meaning given such term in section 1092(a)(8) of the National Defense Authorization Act for Fiscal Year 2017 ( 6 U.S.C. 223(a)(8) ). 3. Maritime border threat analysis (a) In general Not later than 180 days after the date of enactment of this Act, the Secretary of Homeland Security shall submit to the appropriate congressional committees a maritime border threat analysis that includes an identification and description of the following: (1) Current and potential terrorism and criminal threats posed by individuals and groups seeking to— (A) enter the United States through the maritime border; or (B) exploit border vulnerabilities on the maritime border. (2) Improvements needed at United States sea ports to— (A) prevent terrorists and instruments of terror from entering the United States; and (B) reduce criminal activity, as measured by the total flow of illegal goods and illicit drugs, related to the maritime border. (3) Improvements needed with respect to the maritime border to— (A) prevent terrorists and instruments of terror from entering the United States