This excerpt taken from the LUX 20-F filed Jun 28, 2006.
Existing Security) except to the extent the principal amount secured by that Security is increased beyond the amount stated in that Schedule, it being agreed that any such increase shall be permitted to the extent that it falls in the basket set out in sub-paragraph (vii)(A) or (B) of this Clause (as the case may be);
(ii) any netting or set-off arrangement entered into by any member of the Group in the ordinary course of its banking arrangements for the purpose of netting debit and credit balances;
(iii) any lien arising by operation of law and in the ordinary course of trading;
(iv) any Security or Quasi-Security securing indebtedness permitted under paragraph (b) of Clause 22.12 (