; (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 shall have the authority to waive all legal requirements the Secretary, in the Secretary’s sole discretion, determines necessary to ensure the expeditious design, testing, construction, installation, deployment, operation, and maintenance of the physical barriers, 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 new subsections: (e) Technology Not later than September 30, 2022, the Secretary of Homeland Security, in carrying out this section, 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) Limitation on requirements Nothing in this section may be construed as requiring the Secretary of Homeland Security to install tactical infrastructure, technology, and physical barriers in a particular location along an international border of the United States, if the Secretary determines that the use or placement of such resources is not the most appropriate means to achieve and maintain situational awareness and operational control over the international border at such location. (g) 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; and (B) have significant unlawful cross-border activity, as determined by the Secretary of Homeland Security. (2) Operational control The term operational control has the meaning given such term in section 2(b) of the Secure Fence Act of 2006 ( 8 U.S.C. 1701 note