The EU top court said Budapest made it virtually impossible for people to make an asylum claim.
The bloc's Advocate General, Michal Bobek, said on Thursday that the ECJ should dismiss "as unfounded" Hungary's bid to discredit the EU Parliament's vote that called on the bloc to trigger disciplinary proceedings against Budapest.
The EU's top court said the extra leave had to be linked to pregnancy or birth, otherwise, it risks falling foul of the bloc's gender equality rules.
"Being forced to breathe dirty air is unacceptable in the 21st century. Now, in the face of COVID-19, we have all been reminded of how important it is to protect respiratory health," said environmental NGO Client Earth.
The 43-year-old German national is currently in prison on drug trafficking charges but will be released in January. Prosecutors fear he will vanish if his appeal is upheld.
Government bond-buying is at the centre of a complex legal row, bringing national and federal justice into the spotlight.
The decision comes at the end of an almost decade-long battle between budget carrier Ryanair and the Italian Competition and Market Authority