Competences (legislative and non-legislative), legal bases and policy areas where the regional parliament is active  

Legislative: Pursuant to the Northern Ireland Act 1998 (as amended- see link above), the Assembly is competent for:
- Agriculture;
- Education;
- Health and Social Services;
- Economic development;
- Environment;
- Finance and Personnel (except taxation);
- Policing and Justice;
- Culture and Arts;
- Regional Development;
- Social Development.
Moreover, the Assembly is responsible for approving the regional budget.

Non-legislative: The Assembly is inter alia responsible for appointing and controlling the Northern Ireland Executive. For further information, see the Northern Ireland Act 1998 (see link above).

List of committees/sub-committees or working groups in the regional parliament
The Assembly includes six Standing Committees: 

• Committee for Standards and Privileges;
• Public Accounts Committee;
• Audit Committee;
• Business Committee;
• Assembly and Executive Review Committee;
• Committee on Procedures.

In addition, the Assembly includes Statutory Committees - such as the Committee for the Office of the First and deputy First Minister - and Ad Hoc Committees.
For further information, see http://www.niassembly.gov.uk/Assembly-Business/Committees/ (EN).

Committees in charge of scrutinising subsidiarity   
Committee for the Office of the First and deputy First Minister.

Staff in charge of subsidiarity scrutiny  
There is no administrative staff dealing solely with subsidiarity monitoring. However, the Assistant Clerk to the Committee for the Office of the First Minister and deputy First Minister as well as a Senior Research Officer deal with subsidiarity monitoring on an ad hoc basis.

Subsidiarity check  
Nature (selective/systematic): Selective.
Procedure: At present, subsidiarity checks are performed on an ad hoc basis. However, a revision of internal procedures is currently underway to check all explanatory memoranda - which relate to devolved issues - produced by the National Government on EU draft legislation for subsidiarity issues on a weekly basis. This check will be carried out by research staff and committee secretariat staff. The Assembly intends to use the Commission Work Programme as an early warning tool to identify issues where there may be subsidiarity concerns. Moreover, a selective check is conducted whenever colleagues in the other regional parliaments or the National Parliament alert the Assembly to potential subsidiarity issues. This check is carried out by committee secretariat staff with support from colleagues in research and legal services.

Cooperation/coordination at the regional level  
There are no formal or informal channels of cooperation with the Northern Ireland Executive on subsidiarity. The Northern Ireland Executive does not supply EU draft legislative acts, explanatory memoranda or subsidiarity analyses to the Assembly. In isolated and rare cases the information has been supplied when specifically requested by a committee.

Cooperation/coordination at the central level 
No formal coordination exists between the Assembly and the UK Parliament on a systematic basis. Contact with the House of Commons and the House of Lords only occurs in instances where the Assembly wishes to ask the UK Parliament to issue a “reasoned opinion” on a specific EU proposal. Indeed, the National Parliament (NP) is the principal interlocutor with the European Commission. The timescale for such transmission is set by the respective chamber of the NP. If the NP agrees with the Assembly's report, it will refer to the latter in any reasoned opinion on subsidiarity to the European Institutions. Moreover, secretariat staff in the NP emails the regional parliaments if draft acts/explanatory memoranda raise potential subsidiarity concerns.