Margin Stock. None of the Loan Parties is engaged principally, or as one of its important activities, in the business of extending credit for the purpose of purchasing or carrying Margin Stock. No part of the proceeds of any Revolving Credit Loan or Letter of Credit will be used, whether directly or indirectly, and whether immediately, incidentally or ultimately, # to purchase or carry Margin Stock or to extend credit to others for the purpose of purchasing or carrying Margin Stock or to refund Indebtedness originally incurred for such purpose or # for any purpose that entails a violation of, or that is inconsistent with, the provisions of the Regulations of the Board, including Regulations T, U or X.