Louisiana Code of Civil Procedure Tit. I, Art. 1152. Amendment of exceptions

A defendant may amend his declinatory or dilatory exceptions by leave of court or with the written consent of the adverse party, at any time prior to the trial of the exceptions, so as to amplify or plead more particularly an objection set forth or attempted to be set forth in the original exception. A declinatory or a dilatory exception may not be amended so as to plead an objection not attempted to be set forth in the original exception.

A defendant may amend his peremptory exception at any time and without leave of court, so as to either amplify an objection set forth or attempted to be set forth in the original exception, or to plead an objection not set forth therein.