Okla. Admin. Code § 35:30-2-2
For the purpose of meeting the maximum driving and on-duty time exemptions set forth in the National Highway System Designation Act of 1995 the planting and harvesting seasons for agricultural commodities in Oklahoma shall begin on January 1 and end on December 31 of each calendar year.
Added at 13 Ok Reg 3453, eff 7-22-96 (emergency)
Added at 14 Ok Reg 1240, eff 5-12-97