; Public Law 109–367 ). (5) Secretary The term Secretary means the Secretary of Homeland Security. (6) 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 ; 6 U.S.C. 223(a)(7) ). (7) Small unmanned aerial vehicle The term small unmanned aerial vehicle has the meaning given the term small unmanned aircraft in section 331 of the FAA Modernization and Reform Act of 2012 ( Public Law 112–95 ; 49 U.S.C. 40101 note). (8) Transit zone The term transit zone has the meaning given such term in section 1092(a)(8) of the National Defense Authorization Act for Fiscal Year 2017 ( Public Law 114–328 ; 6 U.S.C. 223(a)(7) ). (9) Unmanned aerial system The term unmanned aerial system has the meaning given the term unmanned aircraft system in section 331 of the FAA Modernization and Reform Act of 2012 ( Public Law 112–95 ; 49 U.S.C. 40101 note). (10) Unmanned aerial vehicle The term unmanned aerial vehicle has the meaning given the term unmanned aircraft in section 331 of the FAA Modernization and Reform Act of 2012 ( Public Law 112–95 ; 49 U.S.C. 40101 note). A Infrastructure and Equipment 1111. Strengthening the requirements for barriers along the southern border Section 102 of the Illegal Immigration Reform and Immigrant Responsibility Act of 1996 (Division C of Public Law 104–208 ; 8 U.S.C. 1103 note) is amended— (1) by amending subsection (a) to read as follows: (a) In general The Secretary of Homeland Security shall take such actions as may be necessary (including the removal of obstacles to detection of illegal entrants) to design, test, construct, install, deploy, integrate, and operate physical barriers, tactical infrastructure, and technology in the vicinity of the United States border to achieve situational awareness and operational control of the border and deter, impede, and detect illegal activity in high traffic areas.