Okla. Stat. tit. 75, § 26.11

Beginning on the 15th day of November of each even-numbered year and ending at the time of sine die adjournment of the second regular session during the following even-numbered year, members of the first regular legislative session who have taken the required oath of office therefor and holdover members of the Senate are hereby authorized to prefile legislative bills and resolutions for introduction. Such bills and resolutions shall be in the form required by the rules of the respective houses of the Legislature. Laws 1959, p. 490, § 1; Laws 1965, c. 37, § 1, emerg. eff. Mar. 8, 1965; Laws 1967, c. 173, § 1, emerg. eff. May 1, 1967; Laws 1981, c. 272, § 38, eff. July 1, 1981.