BUDAPEST — The European Court of Justice ruled on Tuesday that Hungary had violated E.U. rules by changing legislation in 2017 that effectively expelled an American university founded by the billionaire financier George Soros from the country.
“The conditions introduced by Hungary to enable foreign higher education institutions to carry out their activities in its territory are incompatible with E.U. law,” the court’s ruling said.
The decision was the latest effort by the European Union to curb growing authoritarianism by the government of Prime Minister Viktor Orban, but is unlikely to have much impact on the ground in Hungary.
The ruling leaves no room for appeal, and requires Mr. Orban’s government to change the legislation to come in line with E.U. laws. If Hungary does not amend the law, the European Commission, the bloc’s executive arm, could request that the high court impose fines on the Hungarian government until it does so.
But the expelled institution, Central European University, is unlikely to restore its former setup in Hungary. Michael Ignatieff, the university’s rector, has said that it will be anchored in Vienna, where it has moved the bulk of its operations.
“We cannot return to Hungary, because its prevailing laws don’t meet the requirements of academic freedom,” Mr. Soros said in a statement on Tuesday. “The Hungarian government continues to trample E.U. law, with the latest victim being the world-renowned University of Theatre and Arts,” he added, referring to a Hungarian university that was the site of student protests last months over the increasing influence of Mr. Orban’s government in the school’s affairs.
Andras Lederer, a program coordinator with the Hungarian Helsinki Committee, a human rights organization in Budapest, said the Central European University case highlighted the need for the European Commission to step in early and suspend legislation it objected to until the bloc’s high court could give a ruling on the matter.
“If that would have happened in the case of C.E.U., the university would still be here,” he said.
Founded and endowed by Mr. Soros after the fall of communism, Central European University was a hub of liberal thought in a region long under authoritarian rule. But after Mr. Orban’s government amended Hungary’s Act on Higher Education to force the university to meet an array of new requirements, Central European University found itself in legal limbo.
The new legislation essentially stripped the university of its ability to grant U.S. diplomas in Hungary, thereby largely preventing it from being able to operate within the country. Central European University currently conducts only a few academic and archiving activities in Budapest.
In its ruling on Tuesday, the European Court of Justice said that the law’s requirements constituted “a means of arbitrarily discrimination” against institutions like Central European University.
Mr. Orban’s government has vigorously defended the legislation, with one minister saying in 2017 that it was not in Hungary’s interest “to allow international influence attempts aimed at making life difficult for the democratically elected government or president.”
Mr. Orban, whose coalition