; and (B) becomes manifest within the period, if any, prescribed in such regulations in a veteran who resided in a private military housing unit during service in the Armed Forces. (3) For purposes of this subsection, a veteran who resided in a private military housing unit while serving in the Armed Forces during the period described in paragraph (2) and who has an illness described in such paragraph shall be presumed to have developed that illness by reason of such service unless there is conclusive evidence to establish that the veteran developed that illness through another means. (b) Determinations relating to diseases (1) Whenever the Secretary determines, in consultation with the Agency for Toxic Substances and Disease Registry, on the basis of sound medical and scientific evidence, that a positive association exists between residence in a private military housing unit and the occurrence of a disease in humans, the Secretary shall prescribe regulations providing that a presumption of service connection is warranted for that disease for the purposes of this section. (2) In making determinations for the purpose of this subsection, the Secretary shall take into account all other sound medical and scientific information and analyses available to the Secretary. In evaluating any study for the purpose of making such determinations, the Secretary shall take into consideration whether the results are statistically significant, are capable of replication, and withstand peer review. (3) An association under paragraph (1) shall be considered to be positive for the purposes of this section if the credible evidence for the association is equal to or outweighs the credible evidence against the association. (c) Removal of diseases Whenever a disease is removed from regulations prescribed under this section— (1) a veteran who was awarded compensation for such disease on the basis of the presumption provided in subsection (a) before the effective date of the removal shall continue to be entitled to receive compensation on