The U.S. Court of Appeals for the Second Circuit approved a key provision of Purdue Pharma’s multibillion-dollar bankruptcy settlement on Tuesday, finding that the plan’s release of liability for members of the Sackler family, who founded Purdue, can stand.

Thirteen months after hearing oral arguments from attorney Marshall Huebner of Davis Polk & Wardwell, representing the Stamford, Connecticut-based pharmaceutical company, and from the U.S. Trustee, which opposed the release, the three-judge panel reversed and remanded a Manhattan U.S. district judge’s ruling vacating the liability release provision.