Louisiana Code of Civil Procedure Tit. I, Art. 929. Time of trial of exceptions

A. The declinatory exception, the dilatory exception, and the peremptory exception when pleaded before or in the answer shall be tried and decided in advance of the trial of the case.

B. If the peremptory exception has been filed after the answer, but at or prior to the trial of the case, it shall be tried and disposed of either in advance of or on the trial of the case. If the peremptory exception has been pleaded after the trial of the case, the court may rule thereon at any time unless the party against whom it has been pleaded desires and is entitled to introduce evidence thereon. In the latter event, the peremptory exception shall be tried specially.