Interest at the judgment interest rate as established by § 6.2-302 on any arrearage pursuant to an order being enforced by the Department pursuant to this chapter shall be collected by the Commissioner except in the case of a minor obligor during the period of his minority. The Commissioner shall maintain interest balance due accounts. In accordance with § 63.2-1908.1, the Commissioner may compromise interest on debt owed to the Commonwealth for reimbursement of public assistance paid.