Okla. Stat. tit. 82, § 1606
Within one hundred eighty (180) days after the effective date of this act, the Board shall develop, adopt and publish criteria and regulations for aiding the floodplain boards in the establishment and delineation of the floodplains and the one-hundred-year flood elevations for Oklahoma.
Laws 1980, c. 179, § 6, emerg. eff. May 13, 1980.