(2), the Secretaries 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. (d) Reports (1) Reports on implementation On a quarterly basis 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 Committees on Veterans’ Affairs and Armed Services of the Senate and the House of Representatives a report on the implementation of this Act and the amendments made by this Act. (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 Secretaries shall jointly submit to the Committees on Veterans’ Affairs and Armed Services of the Senate and the House of Representatives a report on covered veteran beneficiaries enrolled in the TRICARE program. (e) Definitions In this section, the terms covered veteran beneficiary and TRICARE program have the meaning given those terms in section 1072 of title 10, United States Code, as amended by subsection (a).