Louisiana Revised Statutes Tit. 19, § 147. Contesting validity or extent of taking; waiver of defenses; judgment on validity or extent of taking

A. Any defendant desiring to contest the validity or extent of the taking on the ground that the property was not expropriated for a public use may file a motion to dismiss the suit within twenty days from the date the notice was served on him. He shall certify thereon that a copy thereof has been served personally or by mail on either the plaintiff or his attorney of record in the suit. This motion shall be tried contradictorily with the plaintiff.

B. Failure to file the motion to dismiss or to serve a copy thereof on the plaintiff within twenty days from the date the notice was served on him constitutes a waiver of all defenses to the suit except claims for compensation.

C. In the event a defendant files a timely motion to dismiss challenging the validity or extent of the taking, the court shall set the matter for hearing within thirty days after the filing of the motion to dismiss and shall render a decision within five days after the case is submitted. A judgment rendered determining the validity or the extent of the taking pursuant to this Part shall be signed and designated as a final judgment by the court for the purpose of an immediate appeal.