International Convention for the Prevention of Pollution from Ships, 1973

Article 2

Definitions

For the purposes of the present Convention, unless expressly provided otherwise:

(1) Regulation means the regulations contained in the Annexes to the present Convention.
(2) Harmful substance means any substance which, if introduced into the sea, is liable to create hazards to human health, to harm living resources and marine life, to damage amenities or to interfere with other legitimate uses of the sea, and includes any substance subject to control by the present Convention.
(3) (a) Discharge, in relation to harmful substances or effluents containing such substances, means any release howsoever caused from a ship and includes any escape, disposal, spilling, leaking, pumping, emitting or emptying;
  (b) Discharge does not include:
    (i) dumping within the meaning of the Convention on the Prevention of Marine Pollution by Dumping of Wastes and Other Matter, done at London on 13 November 1972; or
    (ii) release of harmful substances directly arising from the exploration, exploitation and associated offshore processing of sea-bed mineral resources; or
    (iii) release of harmful substances for purposes of legitimate scientific research into pollution abatement or control.
(4) Ship means a vessel of any type whatsoever operating in the marine environment and includes hydrofoil boats, air-cushion vehicles, submersibles, floating craft and fixed or floating platforms.
(5) Administration means the Government of the State under whose authority the ship is operating. With respect to a ship entitled to fly a flag of any State, the Administration is the Government of that State. With respect to fixed or floating platforms engaged in exploration and exploitation of the sea-bed and subsoil thereof adjacent to the coast over which the coastal State exercises sovereign rights for the purposes of exploration and exploitation of their natural resources, the Administration is the Government of the coastal State concerned.
(6) Incident means an event involving the actual or probable discharge into the sea of a harmful substance, or effluents containing such a substance.
(7) Organization means the Inter-Governmental Maritime Consultative Organization.*

* The name of the Organization was changed to ''International Maritime Organization'' by virtue of amendments to the Organization's Convention which entered into force on 22 May 1982.