Personal Data Protection Act, No. 9 of 2022 63 (a) by the number of members who constitute a quorum being assembled at the place, date and time appointed for the meeting; or (b) by means of audio-visual communication by which all members participating and constituting a quorum can simultaneously see and hear each participating member for the duration of the meeting. (4) All questions for decision at any meeting of the Board shall be decided by the vote of the majority of members present and voting at such meeting. In the case of an equality of votes, the Chairperson shall, in addition to his vote, have a casting vote. (5) The Chairperson shall preside at every meeting of the Board. In the absence of the Chairperson from any meeting of the Board, any member elected by the members present shall preside at such meeting of the Board. (6) The meetings of the Board shall be conducted in conformity with the rules made and procedure established, by it from time to time. 7. No proceeding, act or decision of the Board shall be invalidated by reason only of the existence of a vacancy among its members or of any defect in the appointment of a member thereof. Proceedings, acts or decisions not invalidated by reason of a vacancy 8. (1) The seal of the Authority shall be in the custody of the Board. Seal of the Authority (2) The seal of the Authority may be altered in such manner as may be determined by the Board. (3) The seal of the Authority shall not be affxed to any instrument or document except in the presence of one member of the Board and the Director-General of the Authority or in the absence of the DirectorGeneral, in the presence of any two members of the Board, who shall sign the instrument or document in token of their presence. (4) The Board shall maintain a register of the instruments and documents to which the seal of the Authority has been affixed.