Collateral Arrangements. Counterparty shall (at Enron,s request) either: (i) 
within one Business Day of such request by Enron, provide to Enron a letter 
of credit in respect of Counterparty's obligations under any Transaction, in 
such form and for such amount and from such issuer, as is acceptable to Enron 
in its absolute discretion; or (ii) within such period as is specified by 
Enron, provide for the benefit of Enron a parent company guarantee in such 
form and for such amount as is acceptable to Enron in its absolute 
discretion. Failure so to provide such letter of credit or parent company 
guaranty shall constitute a default hereunder giving rise to the immediate 
right of termination by Enron under this GTC.