Article 30 11.

The CEAOB may establish sub-groups on a permanent or ad hoc basis to examine specific issues under the terms of reference established by it. Participation in the sub-group discussions may be extended to competent authorities from the countries of the European Economic Area (hereinafter referred to as EEA) in the field of audit oversight or by invitation, on a case-by-case basis, to competent authorities from non-EU/EEA countries, subject to the approval of the CEAOB members. The participation of a competent authority from a non-EU/EEA country may be subject to a limited time period.