; (2) the performance measures developed by United States Customs and Border Protection to determine if the Alien Transfer Exit Program is deterring migrants from repeatedly crossing the border or otherwise reducing recidivism; and (3) the consideration given, if any, to the rates of violent crime and the availability of infrastructure and social services in Mexico near such locations. (c) Prohibition on confiscation of property The lawful, nonperishable belongings of a migrant, including all money but excluding property that cannot lawfully be possessed, shall be returned to the migrant prior to transfer, repatriation, or release, in coordination with other State and Federal agencies as necessary. 20. Severability and delegation (a) Severability If any provision of this Act or any amendment made by this Act, or any application of such provision or amendment to any person or circumstance, is held to be unconstitutional, the remainder of the provisions of this Act and the amendments made by this Act and the application of the provision or amendment to any other person or circumstance shall not be affected. (b) Delegation The Secretary of Homeland Security may delegate any authority provided to the Secretary under this Act or an amendment made by this Act to the Secretary of Agriculture, the Attorney General, the Secretary of Defense, the Secretary of Health and Human Services, or the Secretary of State. 21. Improving ports of entry for border security and other purposes There is authorized to be appropriated to the Administrator of the General Services Administration $400,000,000 for fiscal year 2018 for planning, management, design, alteration, and construction of United States Customs and Border Protection-owned land border ports of entry. 22. Improving cross-border transportation There is authorized to be appropriated to the Federal Highway Administration $100,000,000 for fiscal year 2018 for— (1) improvements to existing transportation and supporting infrastructure along the land border ports of entry