Okla. Stat. tit. 47, § 230.34b
A portable scale used at any location other than an official weigh station by the Department of Public Safety or the Corporation Commission to weigh any vehicle transporting grain shall not be located within two (2) highway miles of any commercial grain elevator. This section shall not apply if the vehicle is:
Laws 2006, HB 2895, c. 140, § 3, emerg. eff. May 10, 2006; Amended by Laws 2006, SB 1938, c. 243, § 1, emerg. eff. June 6, 2006 (superseded document available).