Apple Inc. violated a court order requiring it to open up the App Store to third-party payment options and must stop charging commissions on purchases outside its software marketplace, a federal judge said.

The judge in Epic v. Apple has banned Apple from charging a commission on purchases made outside the App Store because of its ongoing anticompetitive behavior.

U.S. District Judge Yvonne Gonzalez Rogers determined that Apple’s implementation of a 27% fee on external purchases and the display of warnings about third-party payment methods obstructed the court’s directive to permit developers to inform users about alternative payment options.