324 



4. Such installations and devices, though under the jurisdiction of 

 the coastal State, do not possess the status of islands. They have 

 no territorial sea of their own, and their presence does not affect the 

 delimitation of the territorial sea of the coastal State. 



5. Due notice must be given of the construction of any such installa- 

 tions, and permanent means for giving warning of their presence must 

 be maintained. Any installations which are abandoned or disused 

 must be entirely removed. 



6. Neither the installations or devices, nor the safety zones around 

 them, may be established where interference may be caused to the use 

 of recognized sea lanes essential to international navigation. 



7. The coastal State is obliged to undertake, in the safety zones, all 

 appropriate measures for the protection of the living resources of the 

 sea from harmful agents. 



8. The consent of the coastal State shall be obtained in respect of 

 any research concerning the continental shelf and undertaken there. 

 Nevertheless the coastal State shall not normally withhold its consent 

 if the request is submitted by a qualified institution with a view to 

 purely scientific research into the physical or biological character- 

 istics of the continental shelf, subject to the proviso that the coastal 

 State shall have the right, if it so desires, to participate or to be repre- 

 sented in the research, and that in any event the results shall be 

 published. 



Article 6 



1. Where the same continental shelf is adjacent to the territories 

 of two or more States whose coasts are opposite each other, the bound- 

 ary of the continental shelf appertaining to such State shall be deter- 

 mined by agreement between them. In the absence of agreement, 

 and unless another boundary line is justified by special circumstances, 

 the boundary is the median line, every point of which is equidistant 

 f I'om which the breadth of the territorial sea of each State is measured. 



2. Where the same continental shelf is adjacent to the territories 

 of two adjacent States, the boundary of the continental shelf shall be 

 determined by agreement between them. In the absence of agree- 

 ment, and unless another boundary line is justified by special circum- 

 stances, the boundary shall be determined by application of the prin- 

 ciple of equidistance from the nearest points of the baselines from 

 which the breadth of the territorial sea of each State is measured. 



3. In delimiting the boundaries of the continental shelf, any lines 

 which are drawn in accordance with the principles set out in para- 

 graphs 1 and 2 of this article should be defined with reference to charts 

 and geographical features as they exist at a particular date, and 

 reference should be made to fixed permanent identifiable points on 

 the land. 



Article 7 



The provisions of these articles shall not prejudice the right of the 

 coastal State to exploit the subsoil by means of tunnelling irrespective 

 of the depth of water above the subsoil. 



