From the website:
The Irish Aviation Authority (IAA) is a commercial state-sponsored company which was established on 1 January 1994 to provide air navigation services in Irish-controlled airspace, and to regulate safety standards within the Irish civil aviation industry through:
* Certifying and registering aircraft airworthiness
* Licensing personnel and organisations involved in aircraft maintenance
* Licensing pilots, air traffic controllers and aerodromes
* Approving and monitoring air carrier operating standards.
For more information: http://www.iaa.ie/