(a) No person or entity in this State shall sell, offer for sale or otherwise make available ammonium nitrate or ammonium nitrate materials unless registered annually with the commissioner. Application for registration shall be made by completing and submitting the following form to the commissioner, together with an annual registration fee of $50, provided, however, that retailers who pay fees under this article shall be exempt from such fee:

(b) Every person or entity selling, offering for sale or otherwise making available ammonium nitrate or ammonium nitrate materials shall post and display at all times their registration certificate in a conspicuous place in the room where such business is carried on so that all persons visiting such place may readily see the same.