576 



or cause minor harm to amenities or other legitimate uses of the 

 sea and therefore require special operational conditions. 



(d) Category D — Noxious liquid substances which if dis- 

 charged into the sea from tank cleaning or deballasting operations 

 would present a recognizable hazard to either marine resources or 

 human health or cause minimal harm to amenities or other legiti- 

 mate uses of the sea and therefore require some attention in opera- 

 tional conditions. 



(2) Guidelines for use in the categorization of noxious liquid sub- 

 stances are given in Appendix I to this Annex. 



(3) The list of noxious liquid substances carried in bulk and pres- 

 ently categorized which are subject to the provisions of this Annex is 

 set out in Appendix II to this Annex. 



(4) Where it is proposed to carry a liquid substance in bulk which 

 has not been categorized under paragraph (1) of this Eegulation or 

 evaluated as referred to in Eegulation 4(1) of this Annex, the Gov- 

 ernments of Parties to the Convention involved in the proposed opera- 

 tion shall establish and agree on a provisional assessment for the pro- 

 posed operation on the basis of the guidelines referred to in paragraph 

 (2) of this Regulation. Until full agreement between the governments 

 involved has been reached, the substance shall be carried under the 

 most severe conditions proposed. As soon as possible, but not later thah. 

 ninety days after its first carriage, the Administration concerned shall 

 notify the Organization and provide details of the substance and the 

 provisional assessment for prompt circulation to all Parties for their 

 information and consideration. The Government of each Party shall 

 have a period of ninety days in which to forward its comments to the 

 Organization, with a view to the assessment of the substance. 



EEGULATION 4 



"Other Liquid Substances 



(1) The substances listed in Appendix III to this Annex have been 

 evaluated and found to fall outside the Categories A, B, C and D, as 

 defined in Eegulation 3(1) of this Annex because they are presently 

 considered to present no harm to human health, marine resources, 

 amenities or other legitimate uses of the sea, when discharged into the 

 sea from tank cleaning or deballasting operations. 



(2) The discharge of bilge or ballast water or other residues or mix- 

 tures containing only substances listed in Appendix III to this Annex 

 shall not be subject to any requirement of this Annex. 



(3) The discharge into the sea of clean ballast or segregated ballast 

 shall not be subject to any requirement of this Annex. 



REGULATION' 5 

 DISCHARGE OF NOXIOUS LIQUID SUBSTANCES 



'Categories A^ B and G Siibstances outside Special Areas and Cate- 

 gory D Substances in All Areas 

 Subject to the provisions of Eegulation 6 of this Annex, 

 (1) The discharge into the sea of substances in Category A as 



defined in Eegulation 3(l)(a) of this Annex or of those provisionally 



