The audit mandate is awarded each year by the General Meeting of Shareholders. The current auditors assumed their mandate in 1992 (for the former Flughafen Immobilien Gesellschaft, FIG) at which time the old company law was still in effect. The current auditor in charge, Martin Schaad at KPMG AG, has been responsible for this mandate since 2014, which is limited by law to a period of seven years.

The fee charged by the auditors for the reporting period amounted to CHF 278,500 (2016: CHF 257,000). For additional services outside the audit mandate (audit-related services) the auditors charged a total of CHF 57,200 (2016: CHF 71,200). The following amounts were charged for non-audit-related services: tax consultancy CHF 277,200 (2016: CHF 204,600); other consulting services CHF 15,600 (2016: CHF 13,000).

The Audit & Finance Committee is responsible for monitoring and supervising the external audit. It deals with the formulation and approval of the integrated audit planning, which includes the plans for both the external and the internal audits. Moreover, the Audit & Finance Committee evaluates and analyses the respective audit reports and approves the fees for the external audit.

The auditors provide a written report on the findings of the agreed audit procedures for the Interim Report and the results of the interim audit and the end-of-year audit. The auditor in charge at the auditing firm attends the meetings of the Audit & Finance Committee.