These excerpts taken from the BP 6-K filed May 22, 2008.
124 The Secretary shall be appointed by the Directors on such terms and for such period as they may think fit. Any Secretary so appointed may at any time be removed from office by the Directors, but without prejudice to any claim for damages for breach of any contract of service between him and the Company. If thought fit two or more persons may be appointed as joint secretaries. The Directors may also appoint from time to time on such terms as they may think fit one or more deputy secretaries, assistant secretaries and deputy assistant secretaries. A signature or attestation or certification of or on any document by a deputy, assistant or deputy assistant secretary in that capacity shall in favour of any person dealing with the Company on the faith thereof be as effective as if it were the signature or attestation or certification of or on such document by the Secretary.