In the UK system, a separation of powers is maintained between the Houses of Parliament, the legislative body, Government, the executive body; and the courts, the judiciary. This separation of powers is important for improving accountability, as two bodies can ultimately check the power of the third should it act beyond its remit. For example Section 4 of the Human Rights Act 1998 allows for the judiciary to challenge Acts of Parliament should they be incompatible with the European Convention on Human Rights. In addition to this, the separation of powers helps a state run more efficiently as each body is assigned it's own role. For example, the executive comes up with policy which is then scrutinised by the legislature and finally implemented by the judiciary.