; and (B) for a ship with a tonnage in excess of 2,000 tons, the following amount in addition to that referred to in subparagraph (A): (i) for each ton from 2,001 to 30,000 tons, 400 SDR; (ii) for each ton from 30,001 to 70,000 tons, 300 SDR; and (iii) for each ton in excess of 70,000 tons, 200 SDR. (2) For an environmental emergency arising from an event which does not involve a ship, three million SDR. (3) For the purposes of this subsection: (A) 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; (B) SDR means the Special Drawing Rights as defined by the International Monetary Fund; and (C) a ship’s tonnage shall be the gross tonnage calculated in accordance with the tonnage measurement rules contained in Annex I of the International Convention on Tonnage Measurement of Ships, 1969. (h) Exception Notwithstanding the provisions of subsection (g), liability shall not be limited if it is proved that the environmental emergency resulted from an act or omission of the operator, committed with the intent to cause such emergency, or recklessly and with knowledge that such emergency would probably result. (i) Exception A nongovernmental operator shall not be liable pursuant to subsection (a), subsection (e), subsection (k), or subsection (l) if it proves that the environmental emergency was caused by— (1) an act or omission necessary to protect human life or safety; (2) an event constituting in the circumstances of Antarctica a natural disaster of an exceptional character, which could not have been reasonably foreseen, either generally or in the particular case, provided all reasonable preventative measures were taken that are designed to reduce the risk of environmental emergencies and their potential adverse impact; (3) an act of terrorism by some other person or entity