Case concerning the Loan Agreement between Italy and Costa Rica (dispute arising under a financing agreement), decision of 26 June 1998

Ratification not in compliance with domestic law — “faulty ratification” — circumstances under which a State is entitled to cite its own ratification error — Vienna Convention on the Law of Treaties — principle of good faith — “non venire contra factum proprium” — relationship between domestic law and international law — basic international law principle of the primacy of international law over domestic law — necessity for a “manifest” and “objectively evident” violation of domestic law.

Sustainable Development Goals:

Peace, Justice and Strong Institutions