Northern Ireland's First and Deputy First Ministers have held more talks with the British Prime Minister on the proposals for transferring policing and justice powers from Westminster to Stormont.
Peter Robinson and Martin McGuinness met Gordon Brown at Downing Street this evening.
Mr Robinson said after the meeting he had raised a number of issues with Mr Brown about the funding deal that required clarification.
'We have provided a list of issues to the prime minister for clarification and we are working through those issues,' he told reporters.
Mr Robinson said some were easy and some more difficult, but added: 'All of them I believe are capable of resolution.'
He also said he was looking at publishing the letter so the issues were out in the open.
The letter would be 'better in the public arena', he said, adding: 'There needs to be some transparency about what we are doing.'
It is thought the overall package is worth in the region of £800m.
Sinn Féin accepted Mr Brown's financial offer following a meeting of party officers in Dublin this afternoon.
Mr McGuinness said: 'The issue of funding has now been conclusively dealt with in my view and I think it's now a matter of urgency that we move on and with all speed to ensure that the transfer of power of policing and justice takes place.
'What has to happen is all the participants to this process have to now deal with the logistical arrangements of how we carry that out.
'We intend to have discussions, Peter Robinson and I, with other party leaders back home about the funding arrangements.'
He said agreement on the funding package was a 'tremendous achievement' and a 'momentous' negotiation with Mr Brown.
'I think the challenge now is to press on, to make this happen as soon as possible,' Mr McGuinness said.
