Promotions up to and including Assistant Commissioner are covered by the Garda Síochána (Promotion) Regulations 2006.
I have been informed by the Commissioner that the Code of Practice issued by the Commission for Public Service Appointments formally applies to all competitions within An Garda Síochána up to and including Inspector rank. Procedures that apply to more senior positions are informed by the principles prescribed in the Code of Practice.
The promotion systems in An Garda Síochana may be the subject of review in light of the forthcoming legislation on the Policing Authority.