; and . (g) Savings clause Nothing in this section may be construed as conferring, transferring, or delegating to the Secretary, the Commissioner, the Executive Assistant Commissioner for Air and Marine Operations of CBP, or the Chief of the U.S. Border Patrol any authority of the Secretary of Transportation or the Administrator of the Federal Aviation Administration relating to the use of airspace or aviation safety. (h) Definitions In this section: (1) Got away The term got away has the meaning given such term in section 1092(a)(3) of the National Defense Authorization Act for Fiscal Year 2017 ( Public Law 114–328 ; 6 U.S.C. 223(a)(3) ). (2) 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)(8) ). 112. Eradication of carrizo cane and salt cedar (a) In general Not later than 30 days after the date of the enactment of this Act, the Secretary, in coordination with the heads of relevant Federal, State, and local agencies, shall hire contractors to begin eradicating the carrizo cane plant and any salt cedar along the Rio Grande River that impedes border security operations. Such eradication shall be completed— (1) by not later than September 30, 2027, except for required maintenance