; 37 U.S.C. 403 note) is repealed. (b) Effective date The amendment made by subsection (a) shall take effect on January 1, 2018, and shall apply with respect to individuals who first use their entitlement to educational assistance under chapter 33 of title 38, United States Code, on or after such date. 502. Reconsideration of previously denied claims for disability compensation for veterans who allege full-body exposure to nitrogen mustard gas, sulfur mustard gas, or Lewisite during World War II (a) In general (1) Reconsideration required The Secretary of Veterans Affairs shall reconsider all claims for compensation described in paragraph (2) and make a new determination regarding each such claim. (2) Claims for compensation described A claim for compensation described in this paragraph is a claim for compensation under chapter 11 of title 38, United States Code, that the Secretary determines— (A) arose from the alleged full-body exposure of a veteran to a covered substance— (i) during active military, naval, or air service during World War II; and (ii) at a site listed in paragraph (3)