Yes. Oklahoma law requires insurance companies to offer their policyholders uninsured/underinsured (UM/UIM) motorist covereage in an amount equal to the minimum liability limits on each insured vehicle.

If the insured chooses not to purchased UM/UIM coverage or chooses to purchase UM/UIM coverage with lower limits than the liability limits, a written waiver must be signed by one of the named insureds.

Source: Tit. 36 O.S. 3636.