34 Tex. Admin. Code § 43.15
A motion, unless made during a hearing, shall be made in writing, set forth the relief or order sought, state the grounds for such relief, and be timely filed with SOAH, TRS, or the administrative law judge, as applicable. A copy shall be served by the movant on each party of record. Any reply to the motion shall be timely filed with SOAH, TRS, or the administrative law judge, as applicable, with a copy served on the movant and other parties of record. Failure to serve copies may be grounds for withholding consideration of the motions or replies. Unless otherwise directed by the administrative law judge, executive director, or board, motions based on matters which do not appear of record must be supported by affidavit. When necessary, a hearing will be held to consider any motion.
34 Tex. Admin. Code § 43.15