Unequipped dealers engaged in the sale and delivery of solid fuel in this state, except as provided in section 51:8-7 of this title, shall have such solid fuel weighed on scales tested and approved by the proper weights and measures officers. The owner of the scales on which such weighing is made shall furnish each unequipped dealer with a weight certificate, as provided in section 51:8-9 of this title, for each load or for each separate part of a load, on forms of such unequipped dealers, signed by the weighmaster of such owner, and a copy of each such weight certificate shall be retained at the scales where such weighing is done for a period of one year and shall be subject to inspection by any weights and measures officer. The owner of the scales shall keep, on forms approved by the superintendent of the department, an accurate record of all weighings made and such record shall be open to inspection by any weights and measures officer, for a period of one year.