One of the main challenges to this proposed structure of government will be the impact of the democratic process in each national parliament. Parliamentary democracy thrives on the ability of the members of the parliament to challenge and amend proposed legislation. Under this proposed framework of government either parliament could modify legislation proposed by the United Kingdom Cabinet. The result could be that proposed unified legislation would emerge quite differently from each parliament. However, this is a situation that already exists today within the EU where there is the possibility that twenty-seven different parliaments can challenge and alter proposed EU legislation. This challenge is effectively managed by every EU government and unified EU legislation is successfully created on a regular basis. If it is possible to manage this challenge across twenty-seven nations then managing the challenge between two nations should be quite possible (but not necessarily easy). If significant differences of opinion were ever to emerge between the two national parliaments then the solution to this has again been devised within the EU framework of government; the opt-out. Currently five EU member states have negotiated opt-outs from EU legislation and treaties. If common ground on any proposed unified legislation cannot be found between the two national parliaments then the negotiation of an opt-out will be an obvious course of action.