; 116 Stat. 2136), as amended by section 1807 of this Act, is further amended by adding after the item relating to section 435 the following: 436. Maritime security capabilities assessments. . 1812. Container Security Initiative Section 205(l) of the Security and Accountability for Every Port Act of 2006 ( 6 U.S.C. 945 ) is amended— (1) by striking paragraph (2); and (2) in paragraph (1)— (A) by striking (1) In general .—Not later than September 30, 2007, and inserting Not later than 270 days after the date of enactment of the Maritime Security Improvement Act of 2018 , ; and (B) by redesignating subparagraphs (A) through (H) as paragraphs (1) through (8), respectively. 1813. Maritime border security review (a) Definitions In this section: (1) 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. (2) Transit zone The term transit zone has the meaning given the term in section 1092(a) of the National Defense Authorization Act for Fiscal Year 2017 ( 6 U.S.C. 223(a) ). (b) Maritime border threat analysis (1) 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 committees of Congress a maritime border threat analysis that includes an identification and description of the following: (A) Current and potential threats posed by the individuals and groups seeking to— (i) enter the United States through the maritime border; or (ii) exploit border vulnerabilities on the maritime border. (B) Improvements needed at United States sea ports— (i) to prevent terrorists and instruments of terror from entering the United States; and (ii) to reduce criminal activity, as measured by the total flow of illegal goods and illicit drugs, related to the maritime border. (C) Improvements needed with respect to the maritime border— (i) to prevent terrorists and instruments of terror from entering the United States