All licenses issued pursuant to the provisions of 47 O. S. Section 581 et. seq. and 47 O. S. Section 591.1 et. seq., except licenses for crushers, after January 1, 2016, shall be for a two (2) year licensing period, which shall begin on January 1st of each even numbered year and shall expire on the 31st day of December of the following odd numbered year.
Okla. Admin. Code § 765:4-1-2