January 1990 also marked the beginning of court cases being brought to Yugoslavia's Constitutional Court on the matter of secession. The first was the Slovenian Constitutional Amendments case after Slovenia claimed the right to unilateral secession pursuant to the right of self-determination. The Constitutional Court ruled that secession from the federation was only permitted if there was the unanimous agreement of Yugoslavia's republics and autonomous provinces. The Constitutional Court noted that 1974 Constitution's Section I of the Basic Principles of the Constitution identified that self-determination including secession "belonged to the peoples of Yugoslavia and their socialist republics". The matter of Kosovo secession was addressed in May 1991 with the court claiming that "only the peoples of Yugoslavia" had the right to secession, Albanians were considered a minority and not a people of Yugoslavia.