The National Council is responsible for the state budget and is supported by the ACA in terms of auditing. Therefore, the ACA was established as an independent institution of the National Council and appointed "to audit the management of public funds by the Federation, the Länder, the municipal associations, municipalities with more than 10,000 inhabitants and legal entities defined by law" by the federal constitution.
Alongside various special tasks, the ACA is responsible at a federal level for auditing the
- federal state economy,
- the financial performance of all foundations, funds and establishments that are administered by state institutions or by people appointed by the state,
- financial management of companies
- which are run by the state alone or together with other legal entities that are subject to public auditing or
- of which the state alone or together with other legal entities owns at least 50% or
- of which the state alone or together with other legal entities that are subject to public auditing has de facto control through financial or other economic measures,
- the financial performance of public legal entities using state resources,
- auditing of social insurance agencies,
- control of the financial performance of statutory associations of employers, employees and professionals (chambers) and
- legal entities established by law, e.g. ORF according to § 31a Federal Act on the Austrian Broadcasting Corporation.
The federal constitution grants the president of the ACA the right to participate in debates on ACA reports, federal financial statements, motions on the implementation of certain auditing acts and the chapters of the draft federal finance bill relevant to the ACA, in National Council Committees and plenary sessions.
The reports presented by the ACA to the National Council are discussed in the ACA Committee. The committee is composed of members of the political parties at the same ratio they are represented in the National Council. After the conclusion of those committee debates, to which several respondants are usually invited, the ACA reports are discussed in plenary sessions of the National Council and taken note of.
At the debate of the federal financial statements and the section of the federal finance law relevant to the ACA, the president of the ACA also has the right to participate in the budget committee and to take the floor.
After the convention of the newly elected National Council, the Incompatibility Committee decides to regularly invite the president of the ACA during the legislative period, pursuant to section 40 paragraph 1 rules of procedure of the National Council, on behalf of the president of the National Council to give written statements
- whether certain companies (listed in an appendix) are subject to ACA auditing according to article 126b paragraph 2 Federal Constitutional Law,
- for what individual reasons those companies are subject to the control of ACA,
- and what companies, in the opinion of the ACA, are not obliged to report pursuant to section 6 paragraph 2 of the Incompatibility Act 1983 and
- regarding necessary information in the context of resolutions on the reports of government members and state secretaries (e.g. extent of participation) according to section 3 of the Incompatibility Act 1983.