Okla. Stat. tit. 85A, § 11

Compensation to alien nonresidents of the United States or Canada shall be the same in amount as provided for residents, except that alien nonresident dependents in any foreign country shall be limited to the surviving spouse or children or, if there is no surviving spouse or children, to the surviving father or mother whom the employee has supported, either wholly or in part, for the period of one (1) year before the date of the injury.