Art. 27.03. MOTION TO SET ASIDE INDICTMENT.  In addition to any other grounds authorized by law, a motion to set aside an indictment or information may be based on the following:
1. That it appears by the records of the court that the indictment was not found by at least nine grand jurors, or that the information was not based upon a valid complaint;
2. That some person not authorized by law was present when the grand jury was deliberating upon the accusation against the defendant, or was voting upon the same;  and
3. That the grand jury was illegally impaneled;  provided, however, in order to raise such question on motion to set aside the indictment, the defendant must show that he did not have an opportunity to challenge the array at the time the grand jury was impaneled.
Acts 1965, 59th Leg., p. 317, ch. 722, Sec. 1, eff. Jan. 1, 1966.