; (2) for purposes of an allocation to the Committee on Appropriations pursuant to section 302(a) of the Congressional Budget Act of 1974; and (3) for purposes of paragraph (4)(C) of section 3 of the Statutory Pay-As-You-Go Act of 2010 as being included in an appropriation Act. II Immigration 101. Temporary expulsion of inadmissible arriving aliens (a) In general Notwithstanding any other provision of law, during the period beginning on the date of the enactment of this Act and ending on December 31, 2024, an immigration officer who determines that an alien who is arriving in the United States at or along the border between the United States and Mexico is inadmissible under section paragraph (6)(C) or (7) of section 212(a) of the Immigration and Nationality Act ( 8 U.S.C. 1182(a) ), shall, subject to sections 102 and 103, process the alien for expulsion from the United States without further hearing or review. (b) Detention pending expulsion An alien subject to expulsion under subsection (a) shall be detained pending expulsion. 102. Countries to which aliens may be expelled (a) In general Except as provided in subsection (b), an alien who is processed for expulsion pursuant to section 101(a) shall be expelled to Mexico. (b) Alternative countries If the Government of Mexico is unwilling to accept an alien subject to expulsion under section 101(a) into the territory of Mexico or if the Secretary of Homeland Security determines that expulsion to Mexico would not be in the national interest of the United States, such alien shall be expelled, as directed by the Secretary, to— (1) the country of which such alien is a citizen, subject, or national; (2) the country in which such alien was born; (3) the country in which such alien has a residence