; and (2) a survivor of a veteran who was awarded dependency and indemnity compensation for the death of a veteran resulting from the disease on the basis of the presumption before that date shall continue to be entitled to receive dependency and indemnity compensation on that basis. (e) Reference to National Academies of Sciences, Engineering, and Medicine In the case that the Secretary enters into an agreement with another organization as described in section 202(h)(1) of the Toxic Exposure in the American Military Act of 2020 , any reference in this section to the National Academies of Sciences, Engineering, and Medicine shall be treated as a reference to the other organization. (f) Definitions In this section: (1) The term sufficient evidence of positive association means, with respect to an association between exposure to a toxic substance and the occurrence of a disease in humans, that— (A) there is credible evidence for the association and such evidence is equal to or outweighs the credible evidence against the association