R (Jackson) v Attorney General [2005] UKHL 56 is a House of Lords case noted for containing obiter comments by the Judiciary acting in their official capacity suggesting that there may be limits to parliamentary sovereignty, the orthodox position being that it is unlimited in the United Kingdom. The case, brought by Jackson and two other members of the Countryside Alliance, challenged the use of the Parliament Acts to enact the Hunting Act 2004. The appellants claimed that this Act was invalid as it had been passed using a legislative procedure introduced by the Parliament Act of 1949 which allowed Acts of Parliament to be passed without the consent of the House of Lords if they had been delayed by that chamber for a year. This claim was based on the argument that the enactment of the Parliament Act of 1949 was itself invalid, as it had been passed using a similar procedure introduced by the Parliament Act of 1911. The Divisional Court and Court of Appeal both rejected this claim, although the Court of Appeal held that Parliament Acts procedure could not be used to effect "fundamental constitutional changes". The case was appealed again to the House of Lords. In relation to preliminary issues, the court held that it had jurisdiction to examine the validity of the Hunting Act as a question of statutory interpretation (whether the 1911 Act could be used to enact the 1949 Act); standing was not challenged. On the substantive issue, the court ruled there were no limits to the type of legislation that could be passed using the Parliament Acts except for the express limitations contained in the legislation. The Parliament Act 1949 had therefore been validly passed using the 1911 Act and the Hunting Act was consequently also held to be an Act of Parliament. In obiter comments made in the judgment, Lord Steyn, Lord Hope and Baroness Hale suggested that there might be limits to parliamentary sovereignty (although Lord Bingham and Lord Carswell implicitly supported the orthodox view that there are no limits to parliamentary sovereignty). Jackson prompted debate about the legitimacy of limiting parliamentary sovereignty and the theoretical justifications for the ruling. Alison Young suggests that the opinions could be explained by the Parliament Act 1911 modifying the rule of recognition defining valid legal documents or by the Act redefining Parliament in a manner that binds the courts. Christopher Forsyth argues