; and (B) may not use information contained in the DoD and VA Chemical Biological Warfare Database or any list of known testing sites for mustard gas or lewisite maintained by the Department of Veterans Affairs or the Department of Defense as the sole reason for determining that the veteran did not experience full-body exposure to mustard gas or lewisite. (4) Report Not later than 90 days after the date of the enactment of this Act, and not less frequently than once every 90 days thereafter, the Secretary of Veterans Affairs shall submit to the appropriate committees of Congress a report specifying any claims reconsidered under paragraph (1) that were denied during the 90-day period preceding the submittal of the report, including the rationale for each such denial. (b) Development of policy Not later than one year after the date of the enactment of this Act, the Secretary of Veterans Affairs and the Secretary of Defense shall jointly establish a policy for processing future claims for compensation under chapter 11 of title 38, United States Code, that the Secretary of Veterans Affairs determines are in connection with exposure to mustard gas or lewisite during active military, naval, or air service during World War II. (c) Investigation and report by Secretary of Defense Not later than 180 days after the date of the enactment of this Act, the Secretary of Defense shall— (1) for purposes of determining whether a site should be added to the list of the Department of Defense of sites where mustard gas or lewisite testing occurred, investigate and assess sites where— (A) the Army Corps of Engineers has uncovered evidence of mustard gas or lewisite testing; or (B) more than two veterans have submitted claims for compensation under chapter 11 of title 38, United States Code, in connection with exposure to mustard gas or lewisite at such site and such claims were denied