Okla. Stat. tit. 47, § 47-7-320

Proof of financial responsibility when required under this

article, with respect to a vehicle or with respect to a person who

is not the owner of a vehicle, may be given by filing:

1. A security verification form as defined in Section 7-600 of

this title;

2. A certificate of deposit of money or securities as provided

in Section 7-330 of this title; or

3. A certificate of self-insurance, as provided in Section 7-

503 of this title, supplemented by an agreement by the self-insurer

that, with respect to accidents occurring while the certificate is

in force, the self-insurer will pay the same amounts that an insurer

would have been obliged to pay under a motor vehicle liability

policy if the insurance carrier had issued a policy to the self-

insurer.