Three taxi and limousine trade associations have lost in their bid to revive a case against the city of Newark over what they claim to be comparatively lighter regulations placed upon Uber and other ride-sharing companies than what cab and limo companies operate under.

The U.S. Court of Appeals for the Third Circuit on Monday upheld a New Jersey federal judge’s decision to throw out the case, reasoning that the associations had no constitutionally legal ground to support their claims that Uber was given an unfair advantage.