For the purpose of this chapter, the following terms shall have the following meanings, unless the context clearly indicates otherwise:
(1) DEPARTMENT. The state Department of Conservation and Natural Resources.
(2) DISCHARGE. Includes, but is not limited to, any spilling, leaking, pumping, pouring, emitting, emptying, or dumping in state waters.
(3) MARINA. Any entity required to have a business license which is located on any waters of this state and which moors, docks, stores, or anchors vessels for periods of seven consecutive calendar days or longer for a fee.
(4) MARINE SANITATION DEVICE. Any equipment for installation on board a vessel, or a floating or over-the-water residence, which is designated to receive, retain, treat, or discharge sewage, and any process to treat such sewage except that marine sanitation device shall not be interpreted to include portable toilets of any type.
(5) RECREATIONAL VESSEL. Every description of watercraft or other artificial contrivance used primarily as a means of recreational transportation on the waters of this state. Such term shall exclude, without limitation, commercial watercraft such as a tow boat or commercial passenger carrying vessels.
(6) RESIDENCE BOAT. Any structure used primarily for habitation located on any waters in the state, floating or supported totally or partially on pilings.
(7) SEWAGE. Human body wastes and the wastes from toilets and other receptacles intended to receive or retain body wastes, but does not include by-catch or bait discharge by fishermen, galley water, bath and shower water, or bilge water.