Except as provided by law or by Rule 33.2, a person shall not be found in criminal contempt without a hearing held after notice of the charge. The hearing shall be set so as to allow a reasonable time for the preparation of the defense; the notice shall state the time and place of the hearing, and the essential facts constituting the contempt charged, the notice may be given orally by the judge in open court in the presence of the person charged, or by an order to show cause. The defendant is entitled to subpoena witnesses on his or her behalf and to release under Rule 7.