90 The Society may give any notice to a Member either personally or by sending it by post in a prepaid envelope addressed to the Member at his registered address or by leaving it at that address or by giving it using electronic communications to an address for the time being notified to the Society by the member.
91 Proof that an envelope containing a notice was properly addressed, prepaid, and posted shall be conclusive evidence that the notice was given. Proof that a notice contained in an electronic communication was sent in accordance with guidance issued by the Institute of Chartered Secretaries and Administrators shall be conclusive evidence that the notice was given. A notice shall be deemed to be given at the expiration of 72 hours (120 hours if sent by airmail) after the envelope containing it was posted or, in the case of a notice contained in an electronic communication, at the expiration of 48 hours after the time it was sent.
92 In Articles 89 and 90 “address” in relation to electronic communications includes any number or address used for the purpose of such communications.