Okla. Stat. tit. 51 § 71
The Senate, when sitting as a court of impeachment, shall have power to prescribe and adopt such rules of procedure as it may deem expedient for the orderly trial of the impeachment cases. When an accused person has been placed upon trial and the case is ready to be submitted to the Senators, sitting as members of a court of impeachment, for their decision, the roll of the members shall be called in open session upon each separate charge or count, contained in the articles of impeachment. Each Senator, when his name is called shall, if in his judgment the particular charge submitted has been proven, vote "yea" otherwise he shall vote "nay" which yea and nay vote shall be recorded in the journal of the court. If two-thirds (2/3) of the Senators present shall vote yea upon any charge or count contained in the article of impeachment, the accused shall be adjudged guilty, and the judgment of the court shall be that he be removed from office. The proceedings of the court of impeachment shall be recorded by the clerk in a record kept for such purpose, when any case is finally concluded the record shall be signed by the presiding Justice or presiding officer, attested by the clerk and by him filed in the office of the Secretary of State as a permanent record.
Okla. Stat. tit. 51, § 71