The Department of Environment, Climate and Communications is subdivided into the following divisions:
Climate – The Department has three major aims regarding climate change: To develop a competitive energy supply industry, to ensure security and reliability of energy supply, and to develop energy conservation and end-use efficiency.
Communications – The core policy objective of the Communications Sector is to contribute to sustained macro-economic growth and competitiveness and ensure that the Republic of Ireland is best placed to avail of the emerging opportunities provided by the information and knowledge society, by promoting investment in state-of-the-art infrastructures, by providing a supportive legislative and regulatory environment and by developing a leading edge research and development reputation in the information, communications and digital technologies.
Natural Resources – This division is subdivided into three sectors: the Exploration and Mining Division, Petroleum Affairs Division, and the Geological Survey of Ireland.
the administration and business generally of public services in connection with fisheries, including deep-sea fisheries, tidal waters fisheries, coastal fisheries, inland waters fisheries, and industries connected with or auxiliary to the same, and all powers duties and functions connected with the same, and shall include in particular the business powers, duties and functions of the branches and officers of the public services specified in the Seventh Part of the Schedule to this Act, and of which Department the head shall be, and shall be styled, an t-Aire Iascaigh or (in English) the Minister for Fisheries.
The Schedule assigned it with the duties of the following bodies:[3]
Department of Agriculture and Technical Instruction for Ireland—Fisheries Branch.
Congested Districts Board for Ireland—Fisheries Branch, and Rural Industries Branch.
^Ministers and Secretaries Act 1924, s. 1: Establishment of the Departments of State (No. 16 of 1924, s. 1). Enacted on 21 April 1924. Act of the Oireachtas. Retrieved from Irish Statute Book on 3 November 2019.
^The Irish Land Commission (Re-Distribution of Public Services) Order 1927 (S.R.O. No. 55 of 1927). Signed on 20 July 1927. Statutory Rules and Orders of the Executive Council. Retrieved from Irish Statute Book on 17 January 2021.
^Ministers and Secretaries (Amendment) Act 1928 (Commencement) Order 1928 (S.R.O. No. 49 of 1928). Signed on 7 August 1928. Statutory Rules and Orders of the Executive Council. Retrieved from Irish Statute Book on 14 September 2019.
^Fisheries (Transfer of Departmental Administration and Ministerial Functions) Order 1957 (S.I. No. 67 of 1957). Signed on 2 April 1957. Statutory Instrument of the Government of Ireland. Retrieved from Irish Statute Book on 14 August 2020.
^Fisheries (Transfer of Departmental Administration and Ministerial Functions) Order 1965 (S.I. No. 83 of 1965). Signed on 3 May 1965. Statutory Instrument of the Government of Ireland. Retrieved from Irish Statute Book on 14 September 2019.
^Lands (Transfer of Departmental Administration and Ministerial Functions) Order 1977 (S.I. No. 28 of 1977). Signed on 8 February 1977. Statutory Instrument of the Government of Ireland. Retrieved from Irish Statute Book on 14 September 2019.
^Fisheries (Transfer of Departmental Administration and Ministerial Functions) Order 1977 (S.I. No. 30 of 1977). Signed on 8 February 1977. Statutory Instrument of the Government of Ireland. Retrieved from Irish Statute Book on 14 September 2019.
^Tourism (Transfer of Departmental Administration and Ministerial Functions) Order, 1986 (S.I. No. 42 of 1986). Signed on 18 February 1986. Statutory Instrument of the Government of Ireland. Retrieved from Irish Statute Book on 14 September 2019.
^Fisheries and Forestry (Alteration of Name of Department and Title of Minister) Order 1986 (S.I. No. 40 of 1986). Signed on 18 February 1986. Statutory Instrument of the Government of Ireland. Retrieved from Irish Statute Book on 14 September 2019.
^Tourism, Fisheries and Forestry (Alteration of Name of Department and Title of Minister) Order 1987 (S.I. No. 82 of 1987). Signed on 19 March 1987. Statutory Instrument of the Government of Ireland. Retrieved from Irish Statute Book on 14 September 2019.
^Communications (Transfer of Departmental Administration and Ministerial Functions) Order 1987 (S.I. No. 91 of 1987). Signed on 31 March 1987. Statutory Instrument of the Government of Ireland. Retrieved from Irish Statute Book on 14 September 2019.
^Tourism (Transfer of Departmental Administration and Ministerial Functions) Order 1987 (S.I. No. 95 of 1987). Signed on 31 March 1987. Statutory Instrument of the Government of Ireland. Retrieved from Irish Statute Book on 14 September 2019.
^Forestry and Wildlife (Transfer of Departmental Administration and Ministerial Functions) Order 1987 (S.I. No. 96 of 1987). Signed on 31 March 1987. Statutory Instrument of the Government of Ireland. Retrieved from Irish Statute Book on 14 September 2019.
^Forestry (Transfer of Departmental Administration and Ministerial Functions) Order 1997 (S.I. No. 300 of 1997). Signed on 8 July 1997. Statutory Instrument of the Government of Ireland. Retrieved from Irish Statute Book on 14 September 2019.
^Exploration and Mining (Transfer of Departmental Administration and Ministerial Functions) Order 1997 (S.I. No. 314 of 1997). Signed on 15 July 1997. Statutory Instrument of the Government of Ireland. Retrieved from Irish Statute Book on 14 September 2019.
^Petroleum and Offshore Exploration (Transfer of Departmental Administration and Ministerial Functions) Order 1997 (S.I. No. 429 of 1997). Signed on 30 September 1997. Statutory Instrument of the Government of Ireland. Retrieved from Irish Statute Book on 14 September 2019.
^Broadcasting (Transfer of Departmental Administration and Ministerial Functions) Order 2002 (S.I. No. 299 of 2002). Signed on 18 June 2002. Statutory Instrument of the Government of Ireland. Retrieved from Irish Statute Book on 18 July 2020.
^Communications, Energy and Geological Survey of Ireland (Transfer of Departmental Administration and Ministerial Functions) Order 2002 (S.I. No. 300 of 2002). Signed on 30 September 1997. Statutory Instrument of the Government of Ireland. Retrieved from Irish Statute Book on 14 September 2019.
^Marine and Natural Resources (Alteration of Name of Department and Title of Minister) Order 1997 (S.I. No. 307 of 2002). Signed on 18 June 2002. Statutory Instrument of the Government of Ireland. Retrieved from Irish Statute Book on 14 September 2019.
^Forestry (Transfer of Departmental Administration and Ministerial Functions) Order 2003 (S.I. No. 691 of 2003). Signed on 9 October 2007. Statutory Instrument of the Government of Ireland. Retrieved from Irish Statute Book on 2 February 2024.
^Sea Fisheries, foreshore and Dumping at Sea (Transfer of Departmental Administration and Ministerial Functions) Order 2007 (S.I. No. 707 of 2007). Signed on 9 October 2007. Statutory Instrument of the Government of Ireland. Retrieved from Irish Statute Book on 14 September 2019.
^Communications, Marine and Natural Resources (Alteration of Name of Department and Title of Minister) Order 1997 (S.I. No. 706 of 2007). Signed on 9 October 2007. Statutory Instrument of the Government of Ireland. Retrieved from Irish Statute Book on 14 September 2019.
^Markets in Financial Instruments and Miscellaneous Provisions Act 2007, s. 25: Amendment of Ordnance Survey Ireland Act 2001 (No. 37 of 2007, s. 25). Enacted on 31 October 2007. Act of the Oireachtas. Retrieved from Irish Statute Book on 17 September 2020.
^Markets in Financial Instruments and Miscellaneous Provisions Act 2007 (Commencement) Order 2007 (S.I. No. 730 of 2007). Signed on 1 November 2007. Statutory Instrument of the Government of Ireland. Retrieved from Irish Statute Book on 17 September 2020.
^Worker Participation (State Enterprises) Act 1977 (Transfer of Departmental Administration and Ministerial Functions) Order 2015 (S.I. No. 11 of 2015). Signed on 14 January 2015. Statutory Instrument of the Government of Ireland. Retrieved from Irish Statute Book on 21 September 2020.
^Ordnance Survey Ireland (Transfer of Departmental Administration and Ministerial Functions) Order 2015 (S.I. No. 637 of 2015). Signed on 1 December 2015. Statutory Instrument of the Government of Ireland. Retrieved from Irish Statute Book on 17 September 2020.
^Climate Action and Environment (Transfer of Departmental Administration and Ministerial Functions) Order 2016 (S.I. No. 393 of 2016). Signed on 19 July 2016. Statutory Instrument of the Government of Ireland. Retrieved from Irish Statute Book on 14 September 2019.
^Communications, Energy and Natural Resources (Alteration of Name of Department and Title of Minister) Order 2016 (S.I. No. 421 of 2016). Signed on 19 July 2016. Statutory Instrument of the Government of Ireland. Retrieved from Irish Statute Book on 14 September 2019.