An open government group’s challenge to confidentiality provisions in the Chancery Court’s special arbitration program was argued in U.S. district court in Philadelphia last week, as both sides gained support from high-profile organizations filing amicus briefs in the case.

The Special Arbitration Program was challenged last October in a lawsuit filed by the Delaware Coalition for Open Government, a Wilmington nonprofit that advocates for greater transparency in government. Chancellor Leo E. Strine Jr., the court’s four vice chancellors, the Court of Chancery itself and the state of Delaware were all named as defendants in the suit.