1. The name of the witness and his residence, if known, or that his residence is unknown;

2. The diligence which has been used to procure his attendance; and it shall not be considered sufficient diligence to have caused to be issued, or to have applied for, a subpoena, in cases where the law authorized an attachment to issue; and

3. That the testimony of the witness is believed by the applicant to be material for the State.

Acts 1965, 59th Leg., p. 317, ch. 722, Sec. 1, eff. Jan. 1, 1966.