This excerpt taken from the LUX 20-F filed Jun 28, 2006.
Rollover Loan means one or more Facility C Loans:
(a) made or to be made on the same day that a maturing Facility C Loan is due to be repaid;
(b) the aggregate amount of which is equal to or less than the maturing Facility C Loan (or to the extent such Loan is denominated in an Optional Currency, the aggregate Base Currency Amount of such Loan is equal to or less than the Optional Currency Amount outstanding as calculated at the Agents Spot Rate of Exchange applicable to the relevant Utilisation Request);
(c) in the same currency as the maturing Facility C Loan (unless it arose as a result of the operation of Clause 6 (Unavailability of currency)); and
(d) made or to be made to the same Borrower for the purpose of refinancing a maturing Facility C Loan.