The audit reviewed Commonwealth National Parks involving total assets of $105 million with net operating costs of $41.77 million. Nineteen Commonwealth reserves are declared comprising six terrestrial national parks, one botanic garden and twelve marine parks and reserves totalling some 23 million hectares across Australia, its external territories and Commonwealth marine areas. The objective of the audit was to examine and report on the adequacy of the planning, management and reporting systems which support the Director of National Parks in the achievement of required functions under relevant legislation and agreed outputs and outcomes.

The Australian Taxation Office (ATO) established a task force in 1996 to develop a greater understanding of the factors involved and to devise a coordinated approach in dealing with the cash economy. The objective of the performance audit was to report to Parliament on the ATO's progress in addressing the cash economy, including its monitoring and reporting of outcomes. The audit focused on the ATO's implementation of its Cash Economy Task Force recommendations in the light of the tax reform that has taken place over the last two years.

Taxation rulings are a key mechanism used by the Australian Taxation Office (ATO) to disseminate the Commissioner of Taxation's interpretative advice on Australian taxation law. The objective of the audit was to:

report to Parliament on the operation of the ATO's administration of taxation rulings (public, private and oral rulings); and where appropriate, make recommendations for improvements, having regard to considerations of: efficiency and effectiveness of the ATO's administration of the rulings system, particularly in relation to the achievement of the objectives set by Parliament for the rulings system; the ATO's systems' capacity to deliver consistency and fairness for taxpayers; and good corporate governance, including the control framework.