24. No act, document or writing binds the corporation unless it is signed by the chairman, another member of the board of directors, the secretary or a member of its staff but, in this last case, only to the extent determined by by-law or resolution of the corporation or in writing by the chairman.
However, the corporation may, on the conditions it fixes, allow the signature to be replaced by an engraved, lithographed or printed facsimile.