The Commission is amending its fireworks regulations under the Federal Hazardous Substances Act. This final rule will require that large multiple-tube fireworks devices that have any tube with an inner diameter of 1.5 inches (3.8 cm) or greater pass a performance test for stability. Under the test, these devices may not tip over when inclined at an angle of 60 degrees from the horizontal. This requirement is intended to reduce the risk of injury posed when these fireworks devices tip over during firing. If they tip over, subsequent tubes may discharge in the direction of spectators or others in the vicinity.