; (B) understanding the scope of CBP enforcement authorities and appropriate use of force policies; and (C) screening, identifying, and addressing vulnerable populations, such as children and victims of human trafficking. (d) Northern Border Threat Analysis Not later than 180 days after the date of the enactment of this Act, the Secretary shall submit to the Committee on Homeland Security of the House of Representatives and the Committee on Homeland Security and Governmental Affairs of the Senate an update of the Northern Border Threat Analysis as required in the Northern Border Security Review Act ( Public Law 114–267 ). 1117. Amendments to U.S. Customs and Border Protection (a) Duties Subsection (c) of section 411 of the Homeland Security Act of 2002 ( 6 U.S.C. 211 ) is amended— (1) in paragraph (18), by striking and after the semicolon at the end; (2) by redesignating paragraph (19) as paragraph (22); and (3) by inserting after paragraph (18) the following new paragraphs: (19) administer the U.S. Customs and Border Protection public private partnerships under subtitle G; (20) administer preclearance operations under the Preclearance Authorization Act of 2015 ( 19 U.S.C. 4431 et seq. ; enacted as subtitle B of title VIII of the Trade Facilitation and Trade Enforcement Act of 2015; 19 U.S.C. 4301 et seq. ); (21) authorize preclearance operations under the Preclearance Authorization act of 2015 ( 19 U.S.C. 4431 et seq. ; enacted as subtitle B of title VIII of the Trade Facilitation and Trade Enforcement Act of 2015; 19 U.S.C. 4301 et seq. ) to be conducted at land ports of entry; and . (b) Office of Field Operations staffing Subparagraph (A) of section 411(g)(5) of the Homeland Security Act of 2002 ( 6 U.S.C. 211(g)(5) ) is amended by inserting before the period at the end the following: compared to the number indicated by the current fiscal year work flow staffing model . (c) Implementation plan Subparagraph (B) of section 814(e)(1) of the Preclearance Authorization Act of 2015 ( 19 U.S.C. 4433(e)(1)