The DUP has said the British government must allow it to view the blueprint to save the Belfast Agreement
It is believed that the document could be released to the pro-agreement parties later this week.
DUP deputy leader Mr Peter Robinson said the British government had a human -rights obligation to release the proposals that it is drawing up with Dublin. Speaking after meeting the Northern Secretary, Dr John Reid, last night, Mr Robinson said his party's mandate must be respected.
He claimed the proposals may never be made public if they are not endorsed by the parties that took part in the Weston Park talks.
"They will take stock after the pro-agreement parties have seen the document as to whether the public and indeed its representatives in the DUP will ever see that document," he said.
He would not rule out mounting a legal challenge to any decision not to publish the proposals.
His party was seeking an urgent meeting with the Northern Ireland Human Rights Commission to voice its concerns.
Accusing Dr Reid of stonewalling the six-strong DUP team as they pressed for details on the document, Mr Robinson said: "It is absolutely outrageous that he is not prepared to give an undertaking that at some stage the DUP will see these proposals.
"Does he think we have less of a stake in Northern Ireland than other parties? Our mandate must not be ignored. The DUP is bigger electorally than Sinn Fein/IRA, bigger than the SDLP, and speaks for more unionists than the UUP."
Mr Robinson expressed concern about many concessions to nationalists which are reported to be in the package.
"We are very worried about further moves on demilitarisation and policing. The security situation is currently bad enough. These measures could make it even worse."
The DUP deputy leader said his party would be objecting to the idea of an amnesty for paramilitary offences committed over the past 30 years.
"We will also be seeking assurances on the future of the RUC's full-time reserve and we are hearing there is a proposal that serving RUC officers will have to take the new police service's oath.
"It is because this package is of such importance for policing and clearly has constitutional implications for the people of Northern Ireland, that it is essential all parties see the document."
Mr Robinson claimed there were plans to close further police stations across the North. He also expressed concern that new police officers would not be trained in the use of plastic bullets.