This excerpt taken from the LUX 20-F filed Jun 28, 2006.
(a) If an Obligor fails to pay any amount (other than interest) payable by it under a Finance Document on its due date, interest shall accrue on the overdue amount from the due date up to the date of actual payment (both before and after judgment) at a rate which, subject to paragraph (b) below, is one per cent, per annum higher than the rate which would have been payable if the overdue amount had, during the period of non-payment, constituted a Loan in the currency of the overdue amount for successive Interest Periods, each of a duration selected by the Agent (acting reasonably). Any interest accruing under this Clause 9.3 shall be immediately payable by the Obligor on demand by an Agent.
(b) If any overdue amount consists of all or part of a Loan which became due on a day which was not the last day of an Interest Period relating to that Loan:
(i) the first Interest Period for that overdue amount shall have a duration equal to the unexpired portion of the current Interest Period relating to that Loan; and
(ii) the rate of interest applying to the overdue amount during that first Interest Period shall be one per cent. per annum higher than the rate which would have applied if the overdue amount had not become due.
(c) Default interest (if unpaid) arising on an overdue amount will not be compounded with the overdue amount at the end of each Interest Period and will remain immediately due and payable.