to be unconstitutional, the remainder of this subtitle, the amendments made by this subtitle, and the application of the provisions of such to any person or circumstance shall not be affected thereby. 520. Authorization of funds There are authorized to be appropriated such sums as may be necessary to carry out sections 512, 517, and 518. 521. Sunset provision Except as provided in sections 513 and 516, the provisions of this subtitle shall be effective for the period beginning on the date of enactment of this Act and ending on August 1, 2018. C Higher education disaster relief 531. Definitions In this subtitle: (1) Affected individual The term affected individual means an individual who has applied for or received student financial assistance under title IV of the Higher Education Act of 1965 ( 20 U.S.C. 1070 et seq.) and— (A) who is an affected student