The Traditional Unionist Voice (TUV) conference has been told that to accept the Windsor Framework is to accept that Northern Ireland would "never again be a full part of the United Kingdom".
TUV leader Jim Allister said the Windsor Framework's formal sign-off on Friday was a "day of shame" for the United Kingdom.
He said Foreign Secretary James Cleverly signed away "British sovereignty over a part of this kingdom" and said it confirmed that Northern Ireland would be "treated like a colony" by being subject to European Union laws.