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Data regulator Helen Dixon

Data regulator Helen Dixon

Victory: Austrian lawyer Max Schrems

Victory: Austrian lawyer Max Schrems

REUTERS

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Data regulator Helen Dixon

The Irish Data Protection Commissioner (DPC) has warned that the legality of data transfers from here to the US may now be "questionable" after a landmark European Court struck down a key transatlantic treaty.

Helen Dixon's office stopped short of saying it would take immediate action to cut off services from Facebook or other major tech operations here.

But she said that the European Court of Justice (CJEU) ruling on a case involving Ireland, Facebook and the Austrian privacy campaigner Max Schrems meant that her office would now have to reassess the legality of such services.