(1) The Board must have an official seal which is kept in the custody of the Secretary.
(2) The official seal of the Board must be affixed in the presence of and signed by the Chairperson or the Deputy Chairperson.
(3) All documents other than those required by law to be under seal, which are executed by the Board and all decisions of the Board are to be signed by the Chairperson or any other member duly authorized in writing by the Chairperson to act on behalf of the Chairperson.