Europese Overeenkomst inzake de immuniteit van Staten, Bazel, 16-05-1972

1 Subject to the provisions of Article 5, a Contracting State cannot claim immunity from the jurisdiction of the courts of another Contracting State if the proceedings relate to an obligation of the State, which, by virtue of a contract, falls to be discharged in the territory of the State of the forum.

2 Paragraph 1 shall not apply:

(a) in the case of a contract concluded between States;

(b) if the parties to the contract have otherwise agreed in writing;

(c) if the State is party to a contract concluded on its territory and the obligation of the State is governed by its administrative law.