; (3) the term Indian tribe has the same meaning as in section 4(e) of the Indian Self-Determination and Education Assistance Act ( 25 U.S.C. 450b(e) ); and (4) the term screening technologies means technologies including— (A) walk through metal detection portals; (B) stand-off screening technologies; (C) explosive trace detection; and (D) computed tomography equipment and X-ray imaging equipment for carried and personal belonging screening. 3044. Authorization of appropriations There are authorized to be appropriated to carry out this part $500,000,000 for each of fiscal years 2019 through 2029. .