The government's powers include general executive and statutory powers, delegated legislation, and numerous powers of appointment and patronage. However, some powerful officials and bodies, (e.g. HM judges, local authorities, and the charity commissions) are legally more or less independent of the government, and government powers are legally limited to those retained by the Crown under common law or granted and limited by act of Parliament, and are subject to European Union law and the competencies that it defines. Both substantive and procedural limitations are enforceable in the courts by judicial review.