Okla. Stat. tit. 36, § 36-4409: Age limit

If any such policy contains a provision establishing, as an age

limit or otherwise, a date after which the coverage provided by the

policy will not be effective, and if such date falls within a period

for which premium is accepted by the insurer or if the insurer

accepts a premium after such date, the coverage provided by the

policy will continue in force subject to any right of cancellation

until the end of the period for which premium has been accepted. In

the event the age of the insured has been misstated and if,

according to the correct age of the insured, the coverage provided

by the policy would not have become effective, or would have ceased

prior to the acceptance of such premium or premiums, then the

liability of the insurer shall be limited to the refund, upon

request, of all premiums paid for the period not covered by the

policy.