https://apnews.com/dacdb5339f91338d8bce7cc843162481 > LONDON (AP) — Facebook is subject to EU privacy challenges from watchdogs in any of the bloc's member states, not just its lead regulator in Ireland, the bloc's top court ruled Tuesday, in a ruling that has implications for other big tech companies. > Under the EU's stringent privacy rules, known as the General Data Protection Regulation, only one country's national data protection authority has the power to handle legal cases involving cross-border data complaints in a system known as “one-stop shop.” For Facebook, which has its European headquarters in Dublin, it is Ireland's Data Protection Commission.