The Borrower and each Restricted Subsidiary has filed or caused to be filed all Federal, state and local tax returns required to have been filed and has paid or caused to be paid all taxes required to have been paid by it, except (a) payment of taxes that are being contested in good faith by appropriate proceedings and for which the Borrower or such Restricted Subsidiary, as applicable, has set aside on its books reserves with respect thereto to the extent required by GAAP or (b) to the extent that the failure to do so would not, individually or in the aggregate, reasonably be expected to result in a Material Adverse Effect.