Annex 6 Criteria for establishing ship type requirements from the marine pollution point of view

 Unless a substance has been assigned a higher criteria from the evaluation of its safety hazards, substances that meet one or more of the criteria under each requirement will be considered for the assignment of that requirement.

  Type 1

• .1 Substances which are bioaccumulated to a significant extent and are known to produce a hazard to aquatic life or human health (+ in column A of the GESAMP hazard profile) and which are highly toxic to living resources (4 in column B); or

• .2 Substances which are bioaccumulated to a significant extent and are known to produce a hazard to aquatic life or human health (+ in column A) and which cause severe reduction of amenities (XXX in column E); or

• .3 Substances which are liable to cause tainting of seafood (T in column A)^footnote and which are highly toxic to living resources (4 in column B).

  Type 2

• .1 Substances which are bioaccumulated to a significant extent and are known to produce a hazard to aquatic life or human health (+ in column A) except those in type 1 above; or

• .2 Substances which are bioaccumulated with attendant risk to aquatic organisms or human health, but with short retention of the order of one week or less (Z in column A), and which are highly or moderately toxic to living resources (4 or 3 in column B); or

• .3 Substances which are bioaccumulated with attendant risk to aquatic organisms or human health, but with short retention of the order of one week or less (Z in column A), and which cause severe reduction of amenities (XXX in column E).

• .4 Substances which are liable to cause tainting of seafood (T in column A)^footnote except those in type 1 above; or

• .5 Substances which are highly toxic to living resources (4 in column B);

• .6 Substances which are moderately toxic to living resources (3 in column B) and which cause severe reduction of amenities (XXX in column E).

  Type 3

All substances which do not fall under the criteria for ship types 1 and 2 above but which have been allocated to pollution categories A, B and C in accordance with appendix I to Annex II of MARPOl 73/78.

Note: For ease of interpretation of the criteria detailed above are shown in tabular form below. Those products whose hazard profiles exhibit the complete spectrum required by any one horizontal line in the table should be restricted to carriage in the ship type prescribed (or in ships offering even better protection).

T*: Substances with strong tainting properties as identified by the Sub-Committee on Bulk Chemicals at its fifteenth session. These are as follows:

• Camphor oil
• Creosote (wood tar)
• Cresols (mixed isomers)
• Carbolic oil
• Dichloroethyl ether
• Dichlorophenols
• Ethyl acrylate
• Naphthalene
• alpha-Methyl naphthalene
• Naphthenic acids