A five sided group was established at an early stage to oversee the process of implementing these articles. Senior figures from the Garda Síochána, the Police Service of Northern Ireland, the Policing Board for Northern Ireland, the Northern Ireland Office and the Department of Justice, Equality and Law Reform have been meeting on a regular basis to progress the various issues involved. The full implementation of the different categories of personnel exchange provided for in the agreement required detailed negotiation involving all relevant parties on a number of issues.