Hostages and international rules
The Court finds that Iran, by committing successive and continuing breaches of the obligations laid upon it by the Vienna Conventions of 1961 and 1963 on Diplomatic and Consular Relations, The Treaty of Amity, Economic Relations, and Consular Rights of 1955, and the applicable rules of general international law, has incurred responsibility towards the United States. As to the consequences of this finding, it clearly entails an obligation on the part of the Iranian State to make reparation for the injury thereby caused to the United States. Since however Iran's breaches of its obligations are still continuing, the form and amount of such reparation cannot be determined at the present date. . . .
But what has ablove all to be emphasized is the extent and seriousness of the conflict between the conduct of the Iranian State and its obligations under the whole corpus of the international rules of which diplomatic and consular law is comprised, rules of fundamental character of which the Court must here again strongly affirm. . . .
Such events cannot fail to undermine the edifice of law carefully constructed by mankind over a period of centuries, the maintenance of which is vital for the security and well-being of the complex international community of the present day, to which it is more essential than ever that the rules developed to ensure the ordered progress of relations between its members should be constantly and scrupulously respected.
Before drawing the appropriate conclusions from its findings on the merits in this case, the Court considers that it cannot let pass without comment the incursion into the territory of Iran made by United States military units on 24- 25 April 1980, an account of which has been given earlier in this Judgment (paragraph 32). No doubt the United States Government may have had understandable preoccupations with respect to the well-being of its nationals held hostage in its Embassy for over five months. No doubt also the United States Government may have had understandable feelings of frustration at Iran's long-continued detention of the hostages, notwithstanding two resolutions of the Security Council as well as the Court's own Order of 15 December 1979 calling expressly for their immediate release. Nevertheless, in the circumstances of the present proceedings, the Court cannot fail to express its concern in regard to the United States' incursion into Iran. When, as previously recalled, this case had become ready for hearing on 19 February 1980, the United States Agent requested the Court, owing to the delicate stage of certain negotiations, to defer setting a date for the hearings. Subsequently, on 11 March, the Agent informed the Court of the United States Government's anxiety to obtain an early judgment on the merits of the case. The hearings were accordingly held on 18, 19 and 20 March, and the Court was in course of preparing the present judgment adjudicating upon the claims of the United States against Iran when the operation of 24 April 1980 took place. The Court therefore feels bound to observe that an operation undertaken in those circumstances, from whatever motive, is of a kind calculated to undermine respect for the judicial process in international relations; and to recall that in paragraph 47 1.B. of its Order of 15 December 1979 the Court had indicated that no action was to be taken by either party which might aggravate the tension between the two countries.