Michigan Compiled Laws, Chapter 324. Natural Resources and Environmental Protection § 324.9501

(a) “Approved holding tank” means a holding tank certified by the United States coast guard under part 159 of subchapter O of chapter I of title 33 of the code of federal regulations, 33 C.F.R. part 159.

(b) “Discharge” means spilling, leaking, pumping, pouring, emitting, emptying, or dumping.

(c) “Docking facility” means a public, private, or commercial marina, yacht club, dock, or wharf used for mooring, serving, or otherwise handling watercraft.

(d) “Litter” means rubbish, refuse, waste material, garbage, offal, paper, glass, cans, bottles, trash, debris, oil, or other foreign substances of every kind and description.

(e) “Marine sanitation device” means equipment designed for installation on board a watercraft or installed on board a watercraft to receive, retain, treat, or discharge sewage.

(f) “Oil” means oil of any kind or in any form, including petroleum, fuel oil, sludge, and oil refuse.

(g) “Police officer” means a police officer as defined in section 42 of the Michigan vehicle code, Act No. 300 of the Public Acts of 1949, being section 257.42 of the Michigan Compiled Laws, and a conservation officer.

(h) “Portable” means not permanently affixed to a watercraft and capable of being immediately removed from a watercraft.

(i) “Sewage” means human body wastes, treated or untreated.

(j) “Watercraft” means a contrivance used or capable of being used for navigation upon water, whether or not capable of self-propulsion, including foreign and domestic vessels engaged in commerce upon the waters of this state, passenger or other cargo-carrying vessels, and privately owned recreational watercraft.

(k) “Waters of this state” means waters within the territorial limits of this state including the waters of the Great Lakes that are under the jurisdiction of this state.