The Institute (and CARB) is required to adopt the requirements of the Ethical Standards for Auditors issued by the Auditing Practices Board.
Accordingly as noted in the approach, scope and authority of the Code of Ethics, members should comply with the Ethical Standards for Auditors when conducting audit engagements on Irish or UK companies.
Other Countries
When conducting audit engagements other than of Irish or UK companies, members should comply with the requirements of S290 of the Code of Ethics.
Networks
Audit firms which constitute a network are generally required to be independent of each others clients. Guidance is available on what constitutes a network.