Okla. Admin. Code § 165:30-19-10
When an application for renewal of proportional registration is not received on or before the first day of the month of expiration, the applicant cannot be assured that a registration cab card and plate will be issued for display of credentials prior to the enforcement date. Registrants whose renewal application is not received on or before the expiration date must renew all vehicles in their fleet unless proof of disposition of these vehicles is provided. If this proof shows that the vehicle(s) were disposed of after expiration, those vehicles must be included in the renewal fleet. Registrants whose renewal application is not received on or before the expiration date shall be subject to enforcement for display of credentials on the day following the expiration date.
Okla. Admin. Code § 165:30-19-10