Gabčikovo-Nagymaros Project, Hungary v Slovakia, Judgment, Merits, ICJ GL No 92,  ICJ Rep 7,  ICJ Rep 88, (1998) 37 ILM 162, ICGJ 66 (ICJ 1997), 25th September 1997, International Court of Justice [ICJ]
Whether, in 1989, Hungary was entitled to suspend and subsequently abandon the works on the Gabčikovo–Nagymaros project for which the Treaty on the Construction and Operation of the Gabčikovo–Nagymaros Barrage System attributed responsibility to Hungary.
Whether the 1977 Treaty was ever in force between Hungary and Slovakia.
Whether, in November 1991, the Czech and Slovak Federal Republic was entitled to proceed to the ‘provisional solution’ of damming the Danube River on Czechoslovak territory, which caused downriver effects on water and navigation courses.
What the legal effects were of Hungary's notification on 19 May 1992 of its termination of the 1977 Treaty.