It shall be unlawful for any person other than a licensed commercial salt-water fisherman to use a purse seine. It shall also be unlawful to use a purse seine in any of the salt waters of this state; provided, however, it shall be lawful to use a purse seine in the waters outside, on the seaward side, of the sounds, when such outside waters are opened in accordance with Article 4 of this chapter. As used in this Code section, "purse seine" means a large seine, supported at the upper edge by floats and weighted at the bottom edge, which is designed to be set by one or more boats around a school of fish and so arranged that after the sides have been brought together the bottom of the net can be closed by drawing the purse line taut.