4.No person shall act as a pedlar without such certificate as in this Act mentioned, or in any district where he is not authorized by his certificate so to act.
Any person who—
(1.) acts as a pedlar without having obtained a certificate under this Act authorizing him so to act;
. . . . . . . . . .
shall be liable for a first offence to a penalty not exceeding ten shillings, and for any subsequent offence to a penalty not exceeding one pound.