Okla. Stat. tit. 5, § 16

Within thirty (30) days after this act takes effect, the Supreme Court shall examine applicants for admission to the bar and all applicants who have heretofore been passed upon and allowed to take the examination of the Committee of State Bar Examiners shall be eligible for examination by the Supreme Court at its first examination, and thereafter the Supreme Court shall hold examinations for applicants at least twice each year and at such other times as the Supreme Court may prescribe. Laws 1939, p. 69, § 5.