PEN §27305: All gun show or event vendors shall certify in writing to the producer that they: (a) Will not display, possess, or offer for sale any firearms, ammunition, knives, or weapons for which possession or

All gun show or event vendors shall certify in writing to the producer that they: (a) Will not display, possess, or offer for sale any firearms, ammunition, knives, or weapons for which possession or sale is prohibited. (b) Will not display, possess, or offer for sale any unserialized frame or receiver, including an unfinished frame or receiver. (c) Will not display, possess, or offer for sale any attachment or conversion kit designed to convert a handgun into a short-barreled rifle or into an assault weapon. (d) Acknowledge that they are responsible for knowing and complying with all applicable federal, state, and local laws dealing with the possession and transfer of firearms or ammunition. (e) Will not engage in activities that incite or encourage hate crimes. (f) Will process all transfers of firearms through licensed firearms dealers as required by state law. (g) Will process all sales or transfers of ammunition through licensed firearms dealers or ammunition vendors as required by state law. (h) Will verify that all firearms in their possession at the show or event will be unloaded, and that the firearms will be secured in a manner that prevents them from being operated except for brief periods when the mechanical condition of a firearm is being demonstrated to a prospective buyer. (i) Have complied with the requirements of Section 27320. (j) Will not display or possess black powder, or offer it for sale.