Parliament can also create legislation that changes aspects of the constitution. In Ex parte Canon Selwyn (1872) 36 JP 54, the validity of the Irish Church Act 1869 was challenged by a priest on the grounds that it disestablished his church in Ireland contrary to the Act of Union with Ireland (1800). This argument was rejected by the court, Cockburn CJ stating that:

'There is no judicial body in this country by which the validity of an Act of Parliament could be questioned. An Act of Legislature is superior in authority to any court of law. We have only to administer the law as we find it, and no court could pronounce judgment as to the validity of an Act of Parliament.'