Fundamental questions about the reach of commercial-liability policies in massive pollution cases are headed to the Texas Supreme Court, after the 5th U.S. Circuit Court of Appeals sent an appeal involving the Deepwater Horizon explosion to the state's highest civil court for consideration.

The certified questions the 5th Circuit forwarded to the Supreme Court arise out of the 2010 explosion of the Deepwater Horizon, an offshore drilling platform that sank in the Gulf of Mexico and caused the largest oil spill in U.S. history.