When a registered juvenile sex offender reaches twenty-one (21) years of age or is otherwise released from the custody of the Office of Juvenile Affairs, the district attorney may petition the court to transfer the person's registration to the adult sex offender registry maintained by the Department of Corrections, subject to the provisions of Section 581 et seq. of Title 57 of the Oklahoma Statutes. After notice, if the court determines at a hearing that the person who is registered on the juvenile sex offender registry is likely to or does pose an ongoing serious or aggressive threat to the public or children under sixteen (16) years of age, the court shall order that the delinquent act be deemed an adult criminal conviction for the purpose of registration, notification, and public information access pursuant to Section 581 et seq. of Title 57 of the Oklahoma Statutes. If no petition is filed within ninety (90) days following the twenty-first birthday of the person or the date of release from custody, or if the court determines the person is not likely to or does not pose an ongoing serious or aggressive threat to the public or children under sixteen (16) years of age, the juvenile's name and information shall be deleted from the juvenile sex offender registry, and the person may not be included in the adult sex offender registry.