Every subpoena must be issued in the name of "The State of Texas" and must:
A subpoena must command the person to whom it is directed to do either or both of the following:
A subpoena may be issued by:
A party causing a subpoena to issue must take reasonable steps to avoid imposing undue burden or expense on the person served. In ruling on objections or motions for protection, the court must provide a person served with a subpoena an adequate time for compliance, protection from disclosure of privileged material or information, and protection from undue burden or expense. The court may impose reasonable conditions on compliance with a subpoena, including compensating the witness for undue hardship.
Tex. R. Civ. P. 176