Okla. Stat. tit. 71, § 71-904: Applicable law

A security may be registered in beneficiary form if the form is

authorized by this or a similar statute of the state of organization

of the issuer or registering entity, the location of the registering

entity's principal office, the office of its transfer agent or its

office making the registration, or by this or a similar statute of

the law of the state listed as the owner's address at the time of

registration. A registration governed by the law of a jurisdiction

in which this or similar legislation is not in force or was not in

force when a registration in beneficiary form was made is

nevertheless presumed to be valid and authorized as a matter of

contract law.