147.1(2)No person shall be found to have contravened subsection 147(4), (4.1) or (5) if the person proves that at the time of the giving of the information described in subsection 147(4) or (5) or at the time of the making of the recommendation or giving of the encouragement described in subsection 147(4.1), as the case may be, the person reasonably believed that the person informed of the material fact or material change or the person who received the recommendation or encouragement had knowledge of the material fact or material change.