NOTICE OF PLEDGE 4.1 Subject to Clause 4.3 below the Pledgor undertakes that it will without undue delay, but not later than twenty business days after the date of this Agreement, and, in relation to any Account opened after the date of this Agreement, within ten business days after such new Account has been opened, notify each Account Bank and any other relevant third party of the Pledges by delivering a notification substantially in the form set out in Schedule 3 (Form of Notice of Pledge) by registered mail (Einschreiben mit Rückschein). The Pledgor shall provide the Collateral Agent with a copy of each such notification and of the corresponding return receipt (Rückschein). In addition, the Pledgor shall use all reasonable efforts to procure that each Account Bank promptly acknowledges receipt of the respective notification, and acceptance of the terms thereof, to the Collateral Agent and to the Pledgor.