548 



(2) (a) Subject to the provisions of Kegulation 11 of this Annex, 

 any discharge into the sea of oil or oily mixture from any oil tanker 

 and any ship of 400 tons gross tonnage and above other than an oil 

 tanker shall be prohibited, while in a special area. 



(b) Such ships while in a special area shall retain on board all 

 oil drainage and sludge, dirty ballast and tank washing waters 

 and discharge them only to reception facilities. 



(3) (a) Subject to the provisions of Regulation 11 of this Annex, 

 any discharge into the sea of oil or oily mixture from a ship of less 

 than 400 tons gross tonnage, other than an oil tanker, shall be pro- 

 hibited while in a special area, except when the oil content of the 

 effluent without dilution does not exceed 15 parts per million or alter- 

 natively when all of the following conditions are satisfied : 



( i ) the ship is proceeding en route ; 



(ii) the oil content of the effluent is less than 100 parts per 

 million; and 



(iii) the discharge is made as far as practicable from the 

 land, but in no case less than 12 nautical miles from the 

 nearest land. 



(b) No discharge into the sea shall contain chemicals or other 

 substances in quantities or concentrations which are hazardous to 

 the marine environment or chemicals or other substances intro- 

 duced for the purpose of circumventing the conditions of dis- 

 charge specified in this Regulation. 



(c) The oil residues which cannot be discharged into the sea 

 in compliance with sub-paragraph (a) of this paragraph shall be 

 retained on board or discharged to reception facilities. 



(4) The provisions of this Regulation shall not apply to the dis- 

 charge of clean or segregated ballast. 



(5) Nothing in this Regulation shall prohibit a ship on a voyage 

 only part of which is in a special area from discharging outside the 

 special area in accordance with Regulation 9 of this Annex. 



(6) "Wlienever visible traces of oil are observed on or below the sur- 

 face of the water in the immediate vicinity of a ship or its wake, the 

 Governments of Parties to the Convention should, to the extent they 

 are reasonably able to do so, promptly investigate the facts bearing on 

 the issue of whether there has been a violation of the provisions of 

 this Regulation or Re^ilation 9 of this Annex. The investigation 

 should include, in particular, the wind and sea conditions, the track 

 and speed of the ship, other possible sources of the visible traces in the 

 vicinity, and any relevant oil discharge records. 



(7) Reception facilities within special areas : 



(a) Mediterranean Sea, Black Sea and Baltic Sea areas. 



(i) The Government of each Party to the Convention, the 

 coastline^ of which borders on any given special area under- 

 takes to ensure that not later than 1 January 1977 all oil 

 loading terminals and repair ports within the special area are 

 provided with facilities adequate for the reception and treat- 

 ment of all the dirty ballast and tank washing water from 

 oil tankers. In addition all ports within the special area shall 

 be provided with adequate reception facilities for other resi- 



