General provisions; fee. Those persons qualified through the Department of Public Safety as being physically disabled may register a vehicle that is specially equipped due to the disability of the owner or of a family member related within the second degree of consanguinity, for a reduced fee plus an insurance verification fee. An Affidavit for Physically Disabled Registration Rate must be completed by the owner and accompany the request for the reduced rate.
Okla. Admin. Code § 260:135-7-156