opinion under section 5109 of title 38, United States Code, or section 7109 of such title (as in effect on the day before the date of the enactment of this Act). (3) With respect to the processing by the Secretary of appeals of decisions on legacy claims that opt in to the new appeals system, the following: (A) The cumulative number of such legacy claims. (B) The portion of work in the new appeals system attributable to appeals of decisions on such legacy claims. (C) The average period such legacy claims were pending before opting in to the new appeals system and the average period required to adjudicate such legacy claims on average after opting in— (i) with respect to claims at a regional office of the Department of Veterans Affairs, disaggregated by— (I) supplemental claims under section 5108 of title 38, United States Code, as amended by section 2(i)