17. (1) Any communication of a notice, call or information under this act or a by-law made thereunder shall be given by mailing to the last known address at the corporate seat of the Bar, of a letter, review or newspaper published by the Bar and containing such notice, call or information.
(2) Proof of such communication or of receipt by the Bar of any document may be made before a court or a body of the Bar by producing an affidavit signed by the person who gave the communication or received the document.