The objective of the audit was to assess the Australian Customs and Border Protection Service's administration of the Tariff Concession System.

The Auditor-General responded on 16 June 2021 to correspondence from Senator Malcolm Roberts dated 19 May 2021, requesting that the Auditor-General conduct an investigation to examine the administration of Natural Disaster Relief and Recovery Arrangements programs and funding. 

The Auditor-General responded on 22 June 2017 to correspondence from Senator Sarah Hanson-Young dated 31 May 2017, requesting that the Auditor-General conduct an audit of the current and historical funding practices of the Catholic Education Commissions.

The Auditor-General responded on 14 May 2021 to correspondence from the Hon Julie Collins MP dated 20 April 2021, requesting that the Auditor-General conduct further work identifying strategic risks in grants administration within the Agriculture, Water and the Environment portfolio. 

The Auditor-General responded on 17 April 2025 to correspondence from Senator the Hon Michaelia Cash dated 21 March 2025, requesting that the Auditor-General conduct an investigation to examine the Incolink grant. 

The Auditor-General responded on 2 May 2022 to correspondence from Senator Rex Patrick dated 5 April 2022, requesting that the Auditor-General conduct an investigation to examine the process in making statutory and other senior appointments across the whole government over the six months preceding the application of caretaker conventions prior to the 2022 Federal election. 

The Auditor-General responded on 10 September 2021 to correspondence from Mr Adam Bandt MP dated 25 August 2021, requesting that the Auditor-General conduct an investigation into the management of the Beetaloo Cooperative Drilling Program. 

The objective of this audit was to assess the effectiveness of the Department of Immigration and Border Protection’s administration of health services in onshore immigration detention.

The Auditor-General responded on 7 June 2021 to correspondence from Senator Sarah Hanson-Young dated 10 May 2021, requesting that the Auditor-General conduct an investigation to examine the federal government’s spending on offsets for the Western Sydney Airport.

The audit objective was to assess the effectiveness of the Department of Infrastructure and Regional Development's regulation of passenger security screening at Australian domestic airports.