Pay and discharge, and cause each Guarantor to pay and discharge, prior to delinquency, all taxes, assessments, and governmental charges or levies imposed upon it or upon any of its income or Property as well as all claims of any kind (including claims for labor, materials, supplies, and rent) which, if unpaid, might become a Lien upon any or all of its Property; provided , however , that neither the Borrower nor any Guarantor shall be required to pay any such tax, assessment, charge, levy, or claim if the amount, applicability, or validity thereof shall currently be contested in good faith by appropriate proceedings diligently conducted, no Lien attaches to any of the Property of Borrower and/or any Guarantor or Borrower or any Guarantor, as applicable, has established reserves therefor adequate under GAAP.