; and (2) make determinations and estimates on the basis of the results of such review and all other reviews conducted for the purposes of this section. (f) Reports (1) Initial report (A) In general Under an agreement between the Secretary and the National Academies under this section, not later than 540 days after the date of the enactment of this Act, the National Academies shall submit to the Secretary and the Committee on Veterans’ Affairs of the Senate and the Committee on Veterans’ Affairs of the House of Representatives a report on the activities of the National Academies under the agreement. (B) Elements The report submitted under subparagraph (A) shall include the following: (i) The determinations described in subsection (c)(1). (ii) An explanation of the scientific evidence and reasoning that led to such determinations. (iii) Any recommendations of the National Academies under subsection (d). (2) Periodic updates Under an agreement between the Secretary and the National Academies under this section, not less frequently than once every two years, the National Academies shall submit to the Secretary and the Committee on Veterans’ Affairs of the Senate and the Committee on Veterans’ Affairs of the House of Representatives an updated report on the activities of the National Academies under the agreement. (g) Limitation on authority The authority to enter into agreements under this section shall be effective for a fiscal year to the extent that appropriations are available. (h) Alternative contract scientific organization (1) In general If the Secretary is unable within the period prescribed in subsection (a)(2) to enter into an agreement with the National Academies on terms acceptable to the Secretary, the Secretary shall seek to enter into such an agreement with another appropriate scientific organization that— (A) is not part of the Government; (B) operates as a not-for-profit entity