Okla. Stat. tit. 36, § 6402
The rates for such custom harvesting insurance shall be those rates on file with the Insurance Commissioner on May 15, 1986, or if such rates are not on file and need to be submitted or filed with the Insurance Commissioner.
Laws 1986, HB 2058, c. 181, § 2, emerg. eff. May 15, 1986; Amended by Laws 2005, HB 1535, c. 129, § 16, eff. November 1, 2005 (superseded document available).