The ISA was established by the 1982 UN Convention on the Law of the Sea to regulate mineral resources exploration and exploitation of the international seabed, which falls beyond national jurisdiction.

The council, comprising 36 states, is responsible for developing regulations on deep-sea mining, approving exploration and exploitation contract applications, and overseeing the implementation of contracts.

The ISA has only ever authorised exploration activities, but some states and mining companies are pushing for the commencement of commercial deep-sea mining.

Tánaiste and foreign affairs minister Micheál Martin said: “Ireland will take its seat on the ISA Council at a time when our oceans are already facing significant challenges, including habitat destruction, pollution, unsustainable fishing practices, sea-level rise, ocean acidification and ocean warming.

“On the Council, Ireland will be a voice for upholding international law, for the protection of the marine environment, for science-based decision-making, and for sustainable development. We will also advocate for high standards of institutional governance, transparency and accountability.

“We will continue to oppose deep-sea mining until we have sufficient scientific knowledge and a robust regulatory framework to ensure that it can be done responsibly, in accordance with international law.”

Leticia Carvalho of Brazil has been elected as the ISA’s next secretary-general.

Mr Martin said: “Leticia Carvalho will be the first woman to serve as Secretary-General of the ISA and the first from the Latin America/Caribbean region.

“She will bring a wealth of experience, excellent environmental credentials, and strong personal integrity to the role.”