Borrower shall promptly pay and discharge all taxes, assessments and other governmental charges imposed upon Borrower or any Subsidiary or upon the income, profits, or property of Borrower or any Subsidiary and all claims for labor, material or supplies that, if unpaid, might by law become a lien or charge upon any material property of Borrower or any Subsidiary; provided, however, that none of Borrower or any Subsidiary shall be required to pay any such tax, assessment, charge or claim, so long as the validity thereof shall be contested in good faith by appropriate proceedings, and adequate reserves therefor shall be maintained on the books of Borrower and such Subsidiary.