A federal judge in Manhattan has ruled that a lawsuit brought under Oregon “Blue Sky” law may proceed against the New York law firm Seward & Kissel for allegedly aiding and abetting securities fraud by a client hedge fund.

Aider and abettor claims against lawyers or accountants in securities fraud cases are barred under federal law. But Southern District Judge Harold Baer has ruled they are permissible under a state securities fraud statute, or Blue Sky law.