Any court seised of an application within its jurisdiction hears, even if they require the interpretation of a contract, all the pleas in defence with the exception of those which raise a question falling within the exclusive jurisdiction of another court.
When the solution of a dispute depends on a question raising a serious difficulty and falling within the jurisdiction of the administrative court, the court initially seised refers it to the administrative court with jurisdiction pursuant to Title I of Book III of the Code of Administrative Justice. It shall stay the proceedings until the decision on the question referred for a preliminary ruling.