§ 2200.55 Interrogatories.

(a) General. At any time after the filing of the first responsive pleading or motion that delays the filing of an answer, such as a motion to dismiss, any party may serve interrogatories upon any other party. The number of interrogatories shall not exceed 25 questions, including subparts, except upon the agreement of the parties or by order of the Commission or the Judge. The party seeking to serve more than 25 questions, including subparts, shall have the burden of persuasion to establish that the complexity of the case or the number of citation items necessitates a greater number of interrogatories.