(Federal Republic of Germany/Denmark, Federal Republic of Germany/Netherlands)
I.C.J. Reports 1969
Netherlands and Denmark had drawn partial boundary lines based on the equidistance principle (A-B and C-D). An agreement on further prolongation of the boundary proved difficult because Denmark and Netherlands wished this prolongation to take place based on the equidistance principle (B-E and D-E) where as Germany was of the view that, together, these two boundaries would produce an inequitable result for her. Germany stated that due to its concave coastline, such a line would result in her losing out on her share of the continental shelf based on proportionality to the length of its North Sea coastline. The Court had to decide the principles and rules of international law applicable to this delimitation. In doing so, the court had to decide if the principles espoused by the parties were binding on the parties either through treaty law or customary international law.
The court rejected the argument of Netherlands and Denmark that Germany is still bound by Article 6 of the Geneva Convention on Continental Shelf although she is not a party to the convention. The court stated that only a ‘very definite very consistent course of conduct on the part of a State’ would allow the court to presume that a State had somehow become bound by a treaty (by a means other than in a formal manner: i.e. ratification) when the State was ‘at all times fully able and entitled to…’ accept the treaty commitments in a formal manner. The Court held that Germany had not unilaterally assumed obligations under the Convention. The court also took notice of the fact that even if Germany ratified the treaty, she had the option of entering into a reservation on Article 6 following which that particular article would no longer be applicable to Germany that is even if one were to assume that Germany had intended to become a party to the Convention, it does not