La. Stat. tit. 13 § 5081
The Attorney General, or any district attorney, acting under the direction of the former, or of the governor, shall begin any action to enforce the laws respecting monopolies, combinations or conspiracies in restraint of trade, commerce or business. The prosecuting officer either in preparation for or upon the trial of the case may take testimony of any officer, director, agent or employee of any foreign or domestic corporation, joint stock association, or of any member of any copartnership, or of any individual or individuals against whom proceedings are brought. If the person or persons whose testimony is desired, resides within or outside the state, the prosecuting officer shall file in court where the action is brought, at any time, or with any special commissioner appointed in accordance with R.S. 13:5085 by the court to take testimony, a written statement setting forth the following:
Thereupon the judge, or the commissioner, as the case may be, before whom the testimony is being or shall be taken, shall issue immediately a notice in writing, directed to the attorney of record or to the defendant or defendants themselves in the cause, notifying said person that the testimony of the person or persons, named in the notice is desired, and requiring him to whom the notice is delivered, or served, to notify and have the witness or witnesses whose testimony or evidence it is desired to take to comply with the requirements set forth in the written statement.
If the taking of such evidence is not concluded on the day and date specified in the notice, the court or the commissioner, as the case may be, may continue the taking of such evidence from day to day, or adjourn from day to day, at the same place, until the taking of such evidence has been concluded.
La. R.S. § 13:5081