The Sinn Féin President says his party won't enter into a coalition unless its partner vows to abolish the property tax.
Gerry Adams' comments come after a conference over the weekend discussed the possibility of potential coalition partners.
Sinn Féin has already ruled out going into Government with Fine Gael - with Fianna Fáil seen as the most likely option.
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Gerry Adams says the property tax is a "red line" issue for his party - and Sinn Féin will spell out how it plans to make up the deficit later this year: