Okla. Stat. tit. 56 § 231
Any person who shall make application for aid for dependent children with the Department of Public Welfare, or any of its county offices or other subagencies, must, in order to be eligible for further assistance payments, where the person or persons legally responsible for such support is willfully and without lawful excuse failing to furnish necessary food, clothing, shelter or medical attendance for such child or children, within three (3) months from the day of application request the district attorney of the county where such applicant resides to file criminal charges against the person or persons legally responsible for the support of such child or children, and cooperate fully in prosecuting such charges to completion when filed by the district attorney.
Okla. Stat. tit. 56, § 231