The data label on a solid fuel appliance is the primary evidence of what the unit is and how it was permitted to be installed. It carries the manufacturer, model, listing agency and listing standard, and the clearances to combustibles the unit was tested with. That information is what lets anyone later determine whether the installation matches the listing — whether the clearances are met, whether the chimney system is the one the appliance is listed for, and whether the unit is a fireplace, a stove or an insert with its own requirements. Recording what the label says is therefore substantive rather than clerical. The label must also stay with the appliance permanently, which is why removing it, even to give the client a copy, is wrong; photographing it is fine.