ST. LOUIS - When ruling on a motion to intervene and to unseal the complaint in an antitrust case, a federal district court must consider whether redaction of confidential business information is "practicable," the Eighth Circuit U.S. Court of Appeals ruled Feb. 11 (IDT Corp., et al. v. eBay, et al., No. 11-3009, 8th Cir.; 2013 U.S. App. LEXIS 2807).