Every dealer in gasoline, before selling or exposing or offering for sale any gasoline, and annually thereafter, shall be required to register and shall make known to the Commissioner of Agriculture his desire to sell gasoline giving the name and manner and kind of pump or pumps he will use and the location of same, and shall keep the certificate or certificates of registration issued by the Commissioner of Agriculture posted in a prominent and accessible place in his place of business where such gasoline is sold. The form of such certificate shall be designated by the Commissioner of Agriculture.