Okla. Admin. Code § 670:20-13-12
Credit will be allowed towards the Oklahoma registration fee of a vehicle which is a replacement for a properly registered vehicle destroyed by a tornado in 2013, or any subsequent year, for which a Presidential Major Disaster Declaration was issued. Credit will be allowed on a vehicle which is a replacement for a vehicle destroyed by tornado in calendar years 2012 and 2013 for which no Presidential Major Disaster Declaration was issued. The credit will be prorated to an amount equal to the fee for the number of months remaining on the registration for the destroyed vehicle, as of the date of loss. No excess credit may be refunded. Proof of loss of the destroyed vehicle must ordinarily be provided by the registrant, i.e., a letter or other documentation from the insurance company, identifying the vehicle and confirming its loss. If such documentation is unavailable, the Motor Vehicle Division may be contacted for consideration of an alternative or exception to the documentary requirement.
Okla. Admin. Code § 670:20-13-12