; (B) quantify the impact of any operational decisions of the Postal Service on the direct and indirect costs attributable to any underwater products identified under subparagraph (A); and (C) determine whether any operational decisions of the Postal Service have caused any direct or indirect costs to be inappropriately attributed to any underwater product identified under subparagraph (A). (3) Additional considerations (A) In general Except as provided in paragraph (4), the Commission shall supplement and modify, as appropriate, the record of proceedings in the initial rate regulation review, taking into account the provisions of this Act and the amendments made by this Act, before making a determination to— (i) modify the system for regulating rates and classes for market-dominant products established under section 3622 of title 39, United States Code; or (ii) adopt an alternative system for regulating rates and classes for market-dominant products. (B) Minimum considerations In supplementing or modifying the record under subparagraph (A)— (i) the Commission shall, at a minimum, recalculate the projected liabilities of the Postal Service by reason of the requirements under section 8903c(e) of title 5, United States Code (as added by section 101(a)(1) of this Act) (requiring Medicare-eligible postal annuitants enrolled in the Postal Service Health Benefits Program to also enroll in Medicare)