; 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 the term in section 2(b) of the Secure Fence Act of 2006 ( Public Law 109–367 ; 8 U.S.C. 1701 note). (3) Situational awareness defined The term situational awareness has the meaning given the term in section 1092(a)(7) of the National Defense Authorization Act for Fiscal Year 2017 ( Public Law 114–328 ; 6 U.S.C. 223(a)(7) ). (4) Tactical infrastructure The term tactical infrastructure means— (A) boat ramps, access gates, checkpoints, lighting, and roads; and (B) physical barriers (including fencing, border wall system, and levee walls). (5) Technology The term technology means border surveillance and detection technology, including— (A) tower-based surveillance technology; (B) deployable, lighter-than-air ground surveillance equipment; (C) Vehicle and Dismount Exploitation Radars (VADER); (D) 3-dimensional, seismic acoustic detection and ranging border tunneling detection technology; (E) advanced unattended surveillance sensors; (F) mobile vehicle-mounted and man-portable surveillance capabilities; (G) unmanned aerial vehicles; and (H) predator-type unmanned aircraft systems. . 1112. Land use or acquisition Section 103(b) of the Immigration and Nationality Act ( 8 U.S.C. 1103 note) is amended to read as follows: (b) (1) The Secretary may lease, contract for, or buy any interest in land, including temporary use rights, adjacent to or in the vicinity of an international land border when the Secretary determines that such land is essential to control and guard the boundaries and borders of the United States against any violation of this Act. (2) The Secretary may lease, contract for, or buy any interest in land described in paragraph (1) when— (A) the lawful owner of that interest fixes a price for leasing, contracting, or buying such interest