Nothing in this subchapter shall be construed to prohibit any resident wholesaler, dealer, or jobber to sell at wholesale such 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 Virgin Islands; or the use of fireworks by railroads or other transportation agencies for signal purposes or illumination, or the sale or use of blank cartridges for a show or theatre, or for signal or ceremonial purposes in athletics or sports, or for use by military organizations.