Each Account Party and each of its Subsidiaries has timely filed or caused to be filed all Tax returns and reports required to have been filed and has paid or caused to be paid all Taxes required to have been paid by it, except (a) Taxes that are being contested in good faith by appropriate proceedings and for which such Person has set aside on its books adequate reserves or (b) to the extent that the failure to file any such Tax return or pay any such Taxes could not reasonably be expected to result in a Material Adverse Effect.