“Material Indebtedness” means Indebtedness (other than the Obligations under this Agreement or under any other Loan Document), or obligations in respect of one or more Hedging Agreements, of any one or more of the Company and the Subsidiaries in an aggregate principal amount exceeding US$20,000,000. For purposes of determining Material Indebtedness, the “principal amount” of the obligations of the Company or any Subsidiary in respect of any Hedging Agreement at any time shall be the maximum aggregate amount (giving effect to any netting agreements provided for in such Hedging Agreement) that the Company or such Subsidiary would be required to pay if such Hedging Agreement were terminated at such time.