The Queen of Tuvalu and the Duke of Edinburgh toured Tuvalu between 26–27 October 1982. The royal couple were carried around in ceremonial litters and later served with traditional local dishes on a banquet. A sheet of commemorative stamps was issued for the royal visit by the Tuvalu Philatelic Bureau. By the Act 1 of 1987 of the Parliament of Tuvalu her style and title are: "Elizabeth the Second, by the Grace of God, Queen of Tuvalu and of Her other Realms and Territories, Head of the Commonwealth". This style communicates Tuvalu's status as an independent monarchy, highlighting the Monarch's role specifically as Queen of Tuvalu, as well as the shared aspect of the Crown throughout the Commonwealth. Typically, the Sovereign is styled "Queen of Tuvalu," and is addressed as such when in Tuvalu, or performing duties on behalf of Tuvalu abroad. Under the Constitution of Tuvalu, the oath of allegiance is a declaration of allegiance to "Her Majesty Queen Elizabeth II, Her Heirs and Successors". The Monarchy of Tuvalu exists in a framework of a parliamentary representative democracy. As a constitutional monarch, The Queen acts entirely on the advice of her Government ministers in Tuvalu. The Head of State is recognised in section 50 of the Constitution of Tuvalu, as a symbol of the unity and identity of Tuvalu. The powers of the Head of State are set out in section 52 (1) of the Constitution. Part IV of the Constitution confirms the Head of State of Tuvalu is Queen Elizabeth II as the Sovereign of Tuvalu and provides for the rules for succession to the Crown. As set out in section 54 of the Constitution, the Queen’s representative is the governor general. Section 58 of the Constitution requires the governor general to perform the functions of the Head of State when the Sovereign is outside Tuvalu or otherwise incapacitated. The governor general of Tuvalu is appointed by the monarch upon the advice of the Prime Minister of Tuvalu. In 1986 the Constitution adopted upon independence was amended in order to give attention to Tuvaluan custom and tradition as well as the aspirations and values of the Tuvaluan people. The changes placed greater emphasis on Tuvaluan community values rather than Western concepts of individual entitlement. The preamble was changed and an introductory ‘Principles of the Constitution’ was added. The preamble to the Constitution of Tuvalu recites that the Ellice Islands, after coming under the protection of Queen Victoria in 1892, had, in January 1916, in conjunction with the Gilbert Islands, become known as the Gilbert and Ellice Islands Colony; and that after the Ellice Islands had been established by Queen Elizabeth as a separate colony in October 1975 under their ancient name of Tuvalu, a constitution had been adopted which was given the force of law by Order in Council, taking effect on 1 October 1978.