Okla. Stat. tit. 47, § 47-1116v2: Registration periods

A. Twelve registration periods shall be established for

vehicles required to be registered on a staggered basis. The

registration periods shall start on the first day of each calendar

month and shall end on the last day of that month. Unless otherwise

provided, all such vehicles where the date of execution of transfer

of ownership occurs in this state at any time during a calendar

month shall be subject to registration and payment of the fee for

the registration period commencing the first day of the month of

such date of execution of transfer.

B. A person who registers more than one vehicle may have all of

such vehicles initially registered at the same time or at separate

times. Any person who obtains a vehicle may, upon registration,

have the registration period adjusted to allow future registration

of all such vehicles at the same period or at a different period.

C. On and after January 1, 2022, if a special or personalized

license plate is issued pursuant to this title for a vehicle which

is subject to the requirements of Section 1132 of this title, the

registration periods for the vehicle may be combined into a single

registration period. The Oklahoma Tax Commission shall determine,

by rule, a method for adjusting the twelve-month period.