Okla. Stat. tit. 36, § 36-4018: Incontestability; annuities

If any statements, other than those relating to age, sex and

identity are required as a condition to issuing an annuity or pure

endowment contract, other than a reversionary, survivorship, or

group annuity, and subject to Section 4020 of this article, there

shall be a provision that the contract shall be incontestable after

it has been in force during the lifetime of the person or of each of

the persons as to whom such statements are required, for a period of

two (2) years from its date of issue, except for nonpayment of

stipulated payments to the insurer; and at the option of the insurer

such contract may also except any provisions relative to benefits in

the event of disability and any provisions which grant insurance

specifically against death by accident or accidental means.