147(5)No person who proposes to make a take-over bid, as defined in section 106, for the securities of an issuer, to become a party to a reorganization, amalgamation, merger, arrangement or similar business combination with an issuer or to acquire a substantial portion of the property of an issuer shall inform another person of a material fact or material change with respect to the issuer before the material fact or material change has been generally disclosed unless the information is given in the necessary course of business to effect the take-over bid, business combination or acquisition, as the case may be.