BRUSSELS — Hungary says it has asked the European Union’s top court to annul a new law banning the import of Russian gas into the bloc, filing the challenge within hours of the new law taking effect.

“Today, we took legal action before the European Court of Justice to challenge the REPowerEU regulation banning the import of Russian energy and request its annulment,” Hungary’s Foreign Affairs and Trade Minister Péter Szijjártó said on X.

Member countries agreed to the outright ban on Russian gas late last year in response to the country’s ongoing invasion of Ukraine. The law passed despite Hungary’s opposition.

Szijjártó said Hungary’s case was based on three arguments. “First, energy imports can only be banned through sanctions, which require unanimity. This regulation was adopted under the guise of a trade policy measure,” he said.

“Second, the EU Treaties clearly state that each member state decides its choice of energy sources and suppliers.

“Third, the principle of energy solidarity requires the security of energy supply for all member states. This decision clearly violates that principle, certainly in the case of Hungary.”

Slovakia has also said it will challenge the law in court.