Highway 51, starting from the Oklahoma-Texas state line, 13.0 miles west of Arnett, extending east across the state to the Oklahoma-Arkansas state line 9.0 miles south and east of Stilwell, a total distance of approximately 350.0 miles, not including that area designated as the "Jim Thorpe Memorial Highway" or that area designated as the "Broken Arrow Expressway", shall be designated the "42nd 'Rainbow' Infantry Division Memorial Highway". The Oklahoma Department of Transportation shall cause suitable permanent markers to be placed upon the highway bearing the name.
Okla. Stat. tit. 69, § 1628