Sec. 7. (a) As used in this section, "sewage" means human body wastes.
(b) A person may not keep, maintain, or operate upon public water a boat that is equipped with a water closet or toilet unless the water closet or toilet is equipped with a holding tank with the capacity to store wastes for subsequent disposal at:
(1) an approved shoreside facility or incinerator; or
(2) a treatment system approved by the department of environmental management according to rules adopted by the environmental rules board.
(c) A person may not dispose of sewage accumulated in a holding tank or any other container on a watercraft in a manner that the sewage reaches or may reach public waters, except through a sewage disposal facility approved by the department of environmental management according to rules adopted by the environmental rules board.