The audit followed-up the ANAO's original audit report into the aviation safety regulatory activities of the Civil Aviation Safety Authority (CASA) (Audit Report No.19 1999-2000 Aviation Safety Compliance). The objective of the follow-up audit were to determine, in respect of issues addressed by the original audit recommendations, whether CASA has made satisfactory progress to improve its aviation safety surveillance and compliance activities; and whether the introduction of new strategies for further improvement is being appropriately managed.