444 



prohibited. However, if, in the opinion of the master, 

 special circumstances make it neither reasonable nor practicable 

 to retain the oil or oily mixture on board, it may be discharged 

 outside the prohibited zones referred to in Annex A to the 

 Convention. The reasons for such discharge shall be reported 

 to the Contracting Government of the relevant territory in 

 respect of the ship in accordance with paragraph (1) of 

 Article II. FuU details of such discharges shall be reported 

 to the Organization at least every twelve months by Contract- 

 ing Governments. 



4. The existing text of Article TV of the Convention is replaced by 

 the following: 



Article IV 

 Article III shall not apply to: 



(a) the discharge of oil or of oily mixture from a ship for the 

 purpose of securing the safety of a ship, preventing damage 

 to a ship or cargo, or saving life at sea; 



(b) the escape of oil or of oily mixture resulting from damage to 

 a ship or unavoidable leakage, if all reasonable precautions 

 have been taken after the occurrence of the damage or dis- 

 covery of the leakage for the purpose of preventing or minimiz- 

 ing the escape; 



(c) the discharge of residue arising from the purification or 

 clarification of fuel oil or lubricating oil, provided that such 

 discharge is made as far from land as is practicable. 



5. The existing text of Article V of the Convention is replaced by 

 the following: 



Article V 



Article III shall not apply to the discbarge from the bilges of a ship: 



(a) during the period of twelve months following the date on which 

 the present Convention comes into force for the relevant 

 territory in respect of the ship in accordance with paragraph 

 (1) of Article II, of oily mixture; 



(b) after the expiration of such period, of oily mixture containing 

 no oil other than lubricating oil which has drained or leaked 

 from machinery spaces. 



