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1 For the purpose of the regulations of this Annex, noxious liquid substances shall be divided into four categories as follows:
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.1 |
Category X: Noxious liquid substances which, if discharged
into the sea from tank cleaning or deballasting operations, are deemed to present a major hazard to either marine resources or human health and, therefore, justify the prohibition of the discharge into the marine environment; |
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.2 |
Category Y: Noxious liquid substances which, if discharged into the sea from tank cleaning or deballasting operations, are deemed to present a hazard to either marine resources or human health or cause harm to amenities or other legitimate uses of the sea and therefore justify a limitation on the quality and quantity of the discharge into the marine environment; |
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.3 |
Category Z: Noxious liquid substances which, if discharged into the sea from tank cleaning or deballasting operations, are deemed to present a minor hazard to either marine resources or human health and therefore justify less stringent restrictions on the quality and quantity of the discharge into the marine environment; |
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.4 |
Other substances: Substances indicated as OS (Other substances)
in the pollution category column of chapter 18 of the International Bulk Chemical Code which have been evaluated
and found to fall outside category X, Y or Z as defined in
regulation 6.1 of this Annex because they are, at present,
considered to present no harm to marine resources, human
health, amenities or other legitimate uses of the sea when
discharged into the sea from tank cleaning or deballasting
operations. The discharge of bilge or ballast water or other
residues or mixtures containing only substances referred to as
‘‘Other Substances’’ shall not be subject to any requirements of
the Annex. |
2 Guidelines for use in the categorization of noxious liquid substances are given in appendix 1 to this Annex.
3 Where it is proposed to carry a liquid substance in bulk which has not been categorized under paragraph 1 of this regulation, the Governments of Parties to the Convention involved in the proposed operation shall establish and agree on a provisional assessment for the proposed operation on the basis of the guidelines referred to in paragraph 2 of this regulation. Until full agreement among the Governments involved has been reached, the substance shall not be carried. As soon as possible, but not later than 30 days after the agreement has been reached, the Government of the
producing or shipping country, initiating the agreement concerned, shall
notify the Organization and provide details of the substance and the
provisional assessment for annual circulation to all Parties for their
information. The Organization shall maintain a register of all such
substances and their provisional assessment until such time as the substances
are formally included in the IBC Code.
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