If an item is commercially labeled D.O.T. Class C. Fireworks, it is not necessary for the laboratory to analyze the chemical content of the item. The Code of Virginia lists those fireworks that are “legal” and the remainder are excluded based upon their function not chemical composition. Oftentimes a videotape of the device being set off is sufficient for court. See Code of Virginia Sections §59.1-142 and §59.1-147.