Okla. Stat. tit. 17, § 17-3: Pleadings, trial, judgment and appeal

If the defendant shall fail to appear or file answer on the day

mentioned in the citation, such failure to appear or file answer

shall be deemed an admission of the truth of each and every material

allegation in such affidavit, or information, and the Commission may

render judgment without further hearing or testimony; or the

Commission may in its discretion require additional evidence before

rendering judgment in any case of default. Upon the appearance and

filing of answer of the defendant, such appearance may be by plea,

demurrer or answer, and when the issue shall have been settled, the

Commission may hear evidence as to the matters and facts in

reference to the alleged violation of the order or requirement, and

may continue the hearing from time to time, and the defendant shall

be given ample opportunity to introduce proper evidence and be fully

heard in the premises. Upon the conclusion of the evidence and

arguments of counsel, the Commission shall render judgment, a copy

of which shall be delivered to the defendant, and the defendant

shall have five (5) days from the receipt of copy of the judgment to

file its exceptions thereto, and shall be allowed to appeal from the

judgment of the Commission, to the Supreme Court, as provided in

other cases, upon its filing a bond with the Commission in double

the amount of such fine or judgment, with such security as may be

required by the Commission. Upon the filing of such bond with the

commission and allowing of the appeal, the same shall operate a

suspension of the fine and judgment appealed from.