Pay and discharge all Taxes upon the Loan Parties and Subsidiaries, their income and property, prior to the date on which penalties are attached thereto; provided, however, that the Loan Parties and Subsidiaries may in good faith contest any such Taxes so long as (a) such contest is diligently pursued, (b) such Loan Party or Subsidiary has set aside on its books adequate reserves with respect thereto in accordance with GAAP, and (c) no Lien (other than Permitted Liens) or execution exists or is levied against any of the Loan Parties’ or Subsidiaries’ assets related to the contested items.