The Office of the Attorney General may monitor and conduct, at reasonable times, fiscal and/or program audits of county performance in assessing and billing for costs and fees in IV-D cases. A county must grant the Office of the Attorney General access, without prior notice, to all books and records of the county pertinent to the audit. County records relating to costs and fees in IV-D cases may be inspected, monitored, evaluated, audited or copied by the Office of the Attorney General.