; and (C) by inserting after subparagraph (B) the following new subparagraph: (C) carry out the small unmanned aerial vehicle requirements pursuant to section 410(f) of the DHS Authorization Act of 2020; and . (g) Saving clause Nothing in this section shall confer, transfer, or delegate to the Secretary, the Commissioner, the Executive Assistant Commissioner for Air and Marine Operations of U.S. Customs and Border Protection, or the Chief of the U.S. Border Patrol any authority of the Secretary of Transportation or the Administrator of the Federal Aviation Administration relating to the use of airspace or aviation safety. 412. 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 ), as amended by this title, is further amended— (1) in paragraph (20), by striking and after the semicolon at the end; (2) by redesignating paragraph (21) as paragraph (23); and (3) by inserting after paragraph (20) the following new paragraphs: (21) administer the U.S. Customs and Border Protection public private partnerships under subtitle G; (22) 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.); 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) ; enacted as subtitle B of title VIII of the Trade Facilitation and Trade Enforcement Act of 2015