evidence: The party has said it will refuse to go back into power-sharing with the DUP unless there is a firm commitment to an Irish language act. It says the DUP leader Edwin Poots has told it privately that he cannot deliver on that commitment at this time. [...] Speaking on RTÉ's Morning Ireland, Sinn Féin MLA and Northern Ireland Finance Minister Conor Murphy said that if the Irish language legislation is delivered within the time frame agreed last January, then it would allow Sinn Féin to move ahead and nominate a deputy first minister. [...] "If the DUP and Sinn Féin cannot find a way to deliver the Irish language and other cultural commitments that they made last year, then we will step up, step in and seek to table amendments to legislation due at Westminster next week."