When a court of law declares an action of the executive ultra-vires , it implies that

When a court of law declares an action of the executive ultra-vires, it means that the action is illegal and above the power given to the executive by law. The term "ultra-vires" means "beyond the powers" in Latin. The court has determined that the executive has acted outside the scope of its legal authority, and therefore the action is considered null and void. The court's decision invalidates the executive's action and prevents it from being implemented. The legislature may need to pass a new law to give the executive the power to take the action, but the court's ruling means that the current action was not authorized by law.