This excerpt taken from the LUX 20-F filed Jun 28, 2006.
27.13. Relationship with the Lenders
(a) The Agent may treat each Lender as a Lender, entitled to payments under this Agreement and acting through its Facility Office unless it has received not less than five Business Days prior notice from that Lender to the contrary in accordance with the terms of this Agreement.
(b) Each Lender shall supply the Agent with any information required by the Agent in order to calculate the Mandatory Cost in accordance with Schedule 4 (Mandatory Cost formulae).