33. (1) Any exception, exemption, restriction, excuse or limitation, whether it does or does not accompany the description of the offence in the enactment creating the offence, may be proved by the defendant or the accused, but need not be specified or negatived in the information or complaint, and whether it be or be not so specified or negatived, no proof in relation to the matter so specified or negatived shall be required on the part of the informant or complainant.
(2) Whenever it appears that the accused has done any act or been guilty of any omission in respect of which, were he not duly licensed, he would be liable to some penalty, it shall be incumbent upon the accused to prove that he is duly licensed.