Louisiana Code of Evidence Art. 519. Subpoena of judge or his representative in civil and criminal cases

A. General rule. Neither a subpoena nor a court order shall be issued to a judge or his representative to appear or testify in any civil, criminal, or juvenile proceeding, including pretrial discovery or an administrative hearing, unless, after a contradictory hearing, it has been determined that the information sought is not protected from disclosure by the judicial deliberative process privilege, and all of the following:

B. Waiver. Failure to object timely to a party's non-compliance with the provisions of this Article constitutes a waiver of the procedural protections of this Article, but does not constitute a waiver of any privilege.

C. The procedural provisions of and the protections afforded by Paragraph A of this Article shall extend to any judge of any court provided for by Article V of the Constitution of Louisiana and to any commissioner or special master of such court.