period following the date on which the regulations are prescribed under paragraph (2), the Secretary of Veterans Affairs and the Secretary of Defense shall phase in the enrollment of covered veteran beneficiaries in accordance with the annual open enrollment season of the TRICARE program. (4) VA Center for Innovation for Care and Payment The Secretary of Veterans Affairs shall carry out this subsection through the Center for Innovation for Care and Payment of the Department of Veterans Affairs under section 1703E of title 38, United States Code. (d) Reports (1) Reports on implementation Not less frequently than quarterly during the two-year period following the date of the enactment of this Act, the Secretary of Veterans Affairs and the Secretary of Defense shall jointly submit to the appropriate committees of Congress a report on the implementation of this section and the amendments made by this section. (2) Annual reports Not later than one year after the date on which the final report under paragraph (1) is required to be submitted, and annually thereafter, the Secretary of Veterans Affairs and the Secretary of Defense shall jointly submit to the appropriate committees of Congress a report on covered veteran beneficiaries enrolled in the TRICARE program. (e) Definitions In this section: (1) Appropriate committees of Congress The term appropriate committees of Congress means— (A) the Committee on Veterans’ Affairs and the Committee on Armed Services of the Senate