; and (ii) to timely address both appeals of decisions on legacy claims and appeals under the new appeals system. (2) Collaboration In determining whether and when to make a certification under paragraph (1)(B), the Secretary shall collaborate with, partner with, and give weight to the advice of veterans service organizations and such other stakeholders as the Secretary considers appropriate. (3) Early applicability The Secretary may apply the new appeals system to a claim with respect to which the claimant— (A) receives a notice of a decision under section 5104 of such title after the date of the enactment of this Act and before the applicability date set forth in paragraph (1); and (B) elects to subject the claim to the new appeals system. (4) Phased rollout The Secretary may begin implementation of the new appeals system in phases, with the first phase of such phased implementation beginning on the applicability date set forth in paragraph (1). (5) Treatment of legacy claims With respect to legacy claims, upon the issuance to a claimant of a statement of the case or supplemental statement of the case occurring on or after the applicability date specified in paragraph (1), a claimant may elect to participate in the new appeals system. (6) Publication of applicability date Not later than the date on which the new appeals system goes into effect (or the first phase of the new appeals system goes into effect under paragraph (4), as the case may be), the Secretary shall publish in the Federal Register such date. (7) Definitions In this subsection: (A) Appropriate committees of Congress The term appropriate committees of Congress means— (i) the Committee on Veterans' Affairs and the Committee on Appropriations of the Senate