; and (ii) the occurrence of the disease in humans; and (B) may be made pursuant to— (i) a request from the Secretary under subsection (b); or (ii) an agreement between the Secretary and the National Academies under section 3 of the Presumptive Benefits for War Fighters Exposed to Burn Pits and Other Toxins Act of 2020 . (3) (A) Not later than 180 days after the date on which the Secretary publishes any proposed regulations under paragraph (1)(A) for a disease, the Secretary shall prescribe final regulations for that disease. (B) Such regulations shall be effective on the date of issuance. (d) Reference to National Academies In the case that the Secretary enters into an agreement with another organization as described in section 3(h)(1) of the Presumptive Benefits for War Fighters Exposed to Burn Pits and Other Toxins Act of 2020 , any reference in this section to the National Academies shall be treated as a reference to the other organization. (e) Definitions In this section: (1) The term covered toxin means any toxic chemical, including— (A) hazardous waste, mixed waste, solid waste, or used oil (as those terms are defined in section 1004 of the Solid Waste Disposal Act ( 42 U.S.C. 6903 )); (B) radiological waste; and (C) any other carcinogen. (2) The term veterans service organization means an organization recognized by the Secretary for the representation of veterans under section 5902 of this title. (3) The term open burn pit means an area of land located that— (A) is designated by the Secretary of Defense to be used for disposing solid waste by burning in the outdoor air