; (B) by redesignating paragraph (2) as paragraph (3); and (C) by inserting after paragraph (1) the following new paragraph: (2) Notification Not later than seven days after the date on which the Secretary of Homeland Security exercises a waiver pursuant to paragraph (1), the Secretary shall notify the Committee on Homeland Security of the House of Representatives and the Committee on Homeland Security and Governmental Affairs of the Senate of such waiver. ; and (4) by adding at the end the following new subsections: (e) Technology In carrying out this section, the Secretary of Homeland Security shall deploy along the southwest border the most practical and effective technology available for achieving situational awareness and operational control. (f) Definitions In this section: (1) Advanced unattended surveillance sensors The term advanced unattended surveillance sensors means sensors that utilize an onboard computer to analyze detections in an effort to discern between vehicles, humans, and animals, and ultimately filter false positives prior to transmission. (2) Operational control The term operational control has the meaning given such term in section 2(b) of the Secure Fence Act of 2006 ( Public Law 109–367 ; 8 U.S.C. 1701 note). (3) Physical barriers The term physical barriers includes reinforced fencing, the border wall, and levee walls. (4) Situational awareness The term situational awareness has the meaning given such term in section 1092(a)(7) of the National Defense Authorization Act for Fiscal Year 2017 ( Public Law 114–328