Any discharge into the sea (other than an exceptional discharge) of oil or oily mixture from the cargo area is prohibited in a special area. (MARPOL Annex I, reg. 34. 3) The oil residues which cannot be discharged into the sea in compliance with regulation 34.1 or 34.3 must be retained on board for subsequent discharge to reception facilities. (MARPOL Annex I, reg. 34. 9)
A tanker is tank-cleaning while on a ballast passage through an Annex I special area. What are the requirements concerning disposal of oil residues and oil and water used for tank washing?
