; (C) in paragraph (2)— (i) by striking Attorney General and inserting Secretary of Homeland Security ; and (ii) by striking construction of fences and inserting the construction of physical barriers ; and (D) by amending paragraph (3) to read as follows: (3) Agent safety In carrying out this section, the Secretary of Homeland Security, when constructing tactical infrastructure, shall incorporate such safety features into the design of such tactical infrastructure that the Secretary determines, in the Secretary’s sole discretion, are necessary to maximize the safety and effectiveness of officers or agents of the Department of Homeland Security or of any other Federal agency. ; (3) in subsection (c), by amending paragraph (1) to read as follows: (1) In general Notwithstanding any other provision of law, the Secretary of Homeland Security is authorized to waive all legal requirements that the Secretary, in the Secretary’s sole discretion, determines necessary to ensure the expeditious construction, installation, operation, and maintenance of the tactical infrastructure and technology under this section. Any such decision by the Secretary shall be effective upon publication in the Federal Register. ; and (4) by adding after subsection (d) the following: (e) Construction, installation, and maintenance of technology Not later than January 20, 2021, the Secretary of Homeland Security, in carrying out subsection (a), shall deploy along the United States border the most practical and effective technology available for achieving situational awareness and operational control of the border. (f) Definitions In this section: (1) High traffic areas The term high traffic areas means areas in the vicinity of the United States border that— (A) are within the responsibility of U.S. Customs and Border Protection