Signing of ETP Securities. Subject to Clause 3.13, if the ETP Securities of the relevant Tranche are represented by a Global Security, the relevant Global Security shall be signed manually or by fax on behalf of the Issuer by a duly authorised signatory of the Issuer. The Issuer shall promptly notify the Issuing and Paying Agent of any change in the names of the person or persons whose signature is to be used on any ETP Security and shall, if necessary, provide new master Global Securities reflecting such changes. The Issuer may however adopt and use the signature of any person who at the date of signing an ETP Security is a duly authorised signatory of the Issuer even if, before the ETP Security is issued, he ceases for whatever reason to hold such office and the ETP Securities, issued in such circumstances, shall nevertheless be valid and binding obligations of the Issuer. Definitive Securities shall be security printed in accordance with all applicable legal and stock exchange requirements.