BP PLC has petitioned the full U.S. Court of Appeals for the Fifth Circuit to review a three-judge panel’s decision to uphold the Deepwater Horizon oil spill settlement.

In a filing on Monday, BP asked the en banc court to review a lower court ruling that submitting proof of causation—in other words, that damages were caused directly by the 2010 disaster—wasn’t required under the terms of the settlement, which BP has now pegged to be worth about $9.2 billion. A divided Fifth Circuit panel of three judges upheld that order on March 3.