Okla. Stat. tit. 19, § 180.63d
The salary increase authorized by this measure shall be withheld in those counties in which the composite ad valorem assessment ratio for the county is less than nine percent (9%) of the property value as certified by the Board of Equalization at any time during the calendar year 1979, or any year thereafter.
Laws 1978, HB 1631, c. 234, § 3, eff. January 8, 1979.