28. In any action or proceeding under this Act, the certificate of the secretary or executive director certifying under the seal of the Order that a person, on a specified date, was or was not a member of the Order or was under suspension as a member, shall be proof of its contents, of the authenticity of his signature and of the truth of any other matter mentioned, until the contrary is proved.
R. S. 1964, c. 262, s. 32; 1973, c. 60, s. 26; 1974, c. 65, s. 48; 1975, c. 80, s. 39.