Section 21

Whenever, under this Act, a notice or other document is required to be sent to a member of the Corporation, such notice or other document shall, if sent by post addressed to such member at his address as is, for the time being, stated in the Register, be deemed to have been served at the latest within forty-eight hours after the same shall have been posted, and in proving such service it shall be sufficient to prove that the cover containing the same was properly addressed and put into a Post Office. A certificate in writing, signed by at least two members of the Standing Committee, that the letter, envelope or wrapper, was so addressed and posted shall be deemed to be conclusive evidence thereof. The non-receipt of any notice or other document by any member shall not invalidate the proceedings at any meeting.