; or (BB) networks affiliated with such issuer; or (bb) any such network is identified on the list established and updated under subparagraph (D); or (III) subject to clause (ii), the 2 such networks that hold the 2 largest market shares with respect to the number of credit cards issued in the United States by licensed members of such networks (and enabled to be processed through such networks), as determined by the Board on the date on which the Board prescribes the regulations. (ii) Determinations by Board (I) In general The Board, not later than 3 years after the date on which the regulations prescribed under clause (i) take effect, and not less frequently than once every 3 years thereafter, shall determine whether the 2 networks identified under clause (i)(III) have changed, as compared with the most recent such determination by the Board. (II) Effect of determination If the Board, under subclause (I), determines that the 2 networks described in clause (i)(III) have changed (as compared with the most recent such determination by the Board), clause (i)(III) shall no longer have any force or effect. (B) No routing restrictions Not later than 1 year after the date of enactment of the Credit Card Competition Act of 2023 , the Board shall prescribe regulations providing that a covered card issuer or payment card network shall not— (i) directly or through any agent, processor, or licensed member of the network, by contract, requirement, condition, penalty, or otherwise— (I) inhibit the ability of any person who accepts credit cards for payments to direct the routing of electronic credit transactions for processing over any payment card network that— (aa) may process such transactions; and (bb) is not on the list established and updated by the Board under subparagraph (D)