; and (2) assist in the identification of potential payment reforms under this title and title XIX that could more broadly effectuate such improvements. (c) Duration and scope The program conducted under this section shall operate during the period beginning on October 1, 2024, and ending no later than September 30, 2029. (d) Program elements (1) In general An eligible hospital electing to participate in the program shall enter into an agreement with the Secretary for purposes of carrying out the activities described in subsection (b). Such an agreement shall include the plan described in paragraph (2), along with an annualized payment arrangement as described in paragraph (3) to support implementation of such plan. Such agreement shall include a requirement for the hospital to— (A) engage in the learning collaborative established under subsection (e); (B) certify that all proposed innovations under such plan will supplement and not supplant existing activities, whether by augmenting existing activities or initiating new activities; and (C) remit payments made under such arrangement to the Secretary if the Secretary determines that such hospital has not complied with the terms of such agreement. (2) Program elements An eligible hospital electing to participate in the program shall submit a proposed plan and associated quality metrics for review and approval by the Secretary. Such plan and metrics shall, at a minimum, address— (A) the specific innovations addressing mental and physical health comorbidities (as defined in subsection (f)) and innovations addressing social determinants of health (as defined in such subsection) that will be employed and the evidence base supporting the proposed approach; (B) the proposed target population of applicable individuals with respect to which such innovations will be employed, including a description of the extent to which such population consists of applicable individuals described in subparagraph (A), (B), or (C) of subsection (f)(1)