The Green Party is to formalise links with its counterpart in the North at a cermony in Belfast today.
Green Party leader Trevor Sargent will today make the Northern Ireland party a regional council of his own party.
The Green Party in Northern Ireland has also forged ties with its counterparts in Scotland, England and Wales.
It is understood that the party is considering fielding candidates in north Down, south Down and south Belfast if the North goes to the polls to elect a new Assembly next March.
A Northern Ireland Green spokesman said: "What we are doing is following the logic of the Good Friday Agreement and are building relationships and formal ties within these islands.
"Today marks the completion of two years work in bringing us closer with our counterparts in the Irish Republic, but we also have memoranda of understandings with our sister parties in Scotland and in England and Wales.
"By building these relationships, we will be able to tap into the expertise of our sister parties when we head into the next Assembly election and also as a regional executive of the Irish Green Party be able to draw on resources."
PA