547 



their discharge to reception facilities or into t:he sea in compliance with 

 the requirements of paragraph (1) (b) of this Kegulation. 



(3) 'AMienever visible traces of oil are observed on or below the 

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

 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 Regulation 10 of this Annex. The investigation 

 should include, in particiilar, 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. 



(4) The provisions of paragraph (1) of tliis Regulation shall not 

 apply to the discharge of clean or segregated ballast. The provisions 

 of sub-paragraph (1) (b) of this Regulation shall not apply to the dis- 

 charge of oily mixture which without dilution has an oil content not 

 exceeding 15 parts per million. 



(5) Xo discharge into the sea shall contain chemicals or other sub- 

 stances in quantities or concentrations which are hazardous to the ma- 

 rine environment or chemicals or other substances introduced for the 

 purpose of circumventing the conditions of discharge specified in this 

 Regulation. 



(6) The oil residues which cannot be discharged into the sea in com- 

 pliance with paragraphs (1), (2), and (4) of this Regulation shall be 

 retained on board or discharged to reception facilities. 



REGULATIOX 10 



Methods for the Prevention of Oil Pollution from Ships While Oper- 

 ating in Special Areas 

 (1) For the purpose of this Annex the special areas are the Medi- 

 terranean Sea area, the Baltic Sea area, the Black Sea area, the Red 

 Sea area and the "Gulfs area" which are defined as follows : 



(a) The Mediterranean Sea area means the Mediterranean Sea 

 proper including the gulfs and seas therein with the boundary 

 between the Mediterranean and the Black Sea constituted by the 

 41°]^ parallel and bounded to the west by the Straits of Gibraltar 

 at the meridian of 5 °36'W. 



(b) The Baltic Sea area means the Baltic Sea proper with the 

 Gulf of Bothnia, the Gulf of Finland and the entrance to the 

 Baltic Sea bounded by the parallel of the Skaw in the Skagerrak 

 at 57°44.8'N. 



(c) The Black Sea area means the Black Sea proper with the 

 boundary between the Mediterranean and the Black Sea consti- 

 tuted by the parallel 41 °:N'. 



(d) The Red Sea area means the Red Sea proper including the 

 Gulfs of Suez and Aqaba bounded at the south bv the rhumb line 

 between Ras si Ane (12°8.5'N, 43°19.6'E) and Husn Murad 

 (12°40.4'N, 43°30.2'E). 



(e) The "Gulfs area"' means the sea area located north west of 

 the rhumb line between Ras al Hadd (22°30'N, 59°48'E) and Ras 

 AlFasteh (25°04'N, 61°25'E). 



