425 ILCS 30/13.1: Signals or illumination - 3.

Nothing in this Act shall be construed to prohibit any resident wholesaler, dealer, or jobber to sell at wholesale any fireworks as are not herein prohibited; or the sale of any kind of fireworks provided the same are to be shipped directly out of the state; or the use of fireworks by railroads, public utilities, public and private carriers or other transportation agencies for signal purposes or illumination, or the sale or use of blank cartridges for a show or theater, or for signal or ceremonial purposes in athletic or sports events, or for use by military organizations.