Proceedings and instruments

3The quorum of the Board and the arrangements relating to its meetings shall be such as the Board may determine.

4The validity of any proceedings of the Board shall not be affected by any defect in the appointment of a member or of the chairman of the Board, or by a vacancy in the office of chairman.

5A document purporting to be duly executed under the seal of the Board or to be signed on behalf of the Board shall be received in evidence and shall be deemed to be so executed or signed unless the contrary is proved.