The Taoiseach Bertie Ahern has promised to do all he can in the coming days to secure clarification from the DUP on its willingness to share power with Sinn Féin.
Yesterday, the Sinn Féin leadership said it would not go ahead with plans to endorse the PSNI unless the DUP made a firm commitment to power-sharing.
The move follows a string of negative comments from DUP politicians since Sinn Féin decided to hold a special ard fheis to end its opposition to the policing arrangements in the North.
The unionist party says it needs time to assess Sinn Féin's level of co-operation with the PSNI and there will not be enough time for this assessment before the planned restoration of devolution in March.
DUP leader Ian Paisley has also denied agreeing to the transfer of policing powers from London to Stormont in May 2008.