Prohibition on certain visa issuances

(a) Visa Ineligibility Notwithstanding any other provision of law and except as provided in subsection (c), the Secretary of State may not issue a visa to, and the Secretary of Homeland Security may not admit to the United States, a covered foreign national who is seeking admission to the United States under a covered visa category. (b) Employment Prohibition at National Laboratories Beginning on the date of enactment of this Act, a national research laboratory may not employ a covered foreign national who is present in the United States under a covered visa category on the date of enactment of this Act. (c) National Interest Waiver The Secretary of State and the Secretary of Homeland Security may jointly waive the application of subsections (a) and (b) with respect to a specific individual if the Secretaries determine that such a waiver is in the National interest of the United States.