(1) The Board shall have a common seal and may alter or change that seal.
(2) The seal of the Board or any document shall be authenticated by the signature of the chairperson or deputy chairperson and the Director or the Secretary of the Board and every document purporting to be a document duly executed under the seal of the Board shall be received in evidence and deemed, without further proof, to be so executed unless the contrary is proved.
(3) All documents, other than those required by law to be under seal, and all decisions of the Board may be signified under the hand of the chairperson, or deputy chairperson, or the Director, or the Secretary of the Board.
(4) Service upon the Board of any notice, order or other document shall be executed by delivering the same to, or by sending it by registered post addressed to the Secretary at the office of the Board.