The Borrower and its Significant Subsidiaries have filed all United States Federal income tax returns and all other tax returns which are required to be filed by them and have paid all taxes due pursuant to such returns or pursuant to any assessment received by the Borrower or any such Significant Subsidiary, except (a) any taxes that are being or promptly will be contested in good faith by appropriate actions or proceedings and for which the Borrower or such Significant Subsidiary, as applicable, has set aside on its books adequate reserves in accordance with GAAP or (b) any tax returns or taxes to the extent that the failure to file such tax returns or pay such taxes would not reasonably be expected to have a Material Adverse Effect.