Subsequent to the tariff approvals, NERSA requests tariff schedules from municipalities and compares them with the approved tariffs to ensure that the correct tariffs are being charged to customers. Further to this, when municipal compliance audits are conducted, NERSA checks the approved tariffs against the implemented tariffs to ensure that there are no discrepancies. It must, however, be noted that municipalities charge surcharges in addition to the NERSA-approved tariffs. Such surcharges fall outside of NERSA’s regulatory mandate.