file from the other flank. Units that traditionally perform ceremonial duties, such as Guard Mounting (changing of the King’s Guard) or Trooping the Colour, are the five regiments of Foot Guards and the Household Cavalry (Blues and Royals and Life Guards), which form the Household Division whilst the Honourable Artillery Company form the Guard of Honour when foreign Heads of State visit London. The Royal Air Force's ceremonial unit is the King's Colour Squadron. The British Armed Forces do not have dedicated ceremonial units other than the King's Troop, Royal Horse Artillery, the Guards and Royal Regiment of Scotland Incremental Companies and the Royal Air Force's King’s Colour Squadron. The King's Guard is primarily made up of units from the Household Division for royal palaces and public monuments—namely Buckingham Palace, St James's Palace, Windsor Castle, and the Tower of London—and other units from all three services of the British Armed Forces filling in when not deployed; in Scotland, Holyrood Palace and Edinburgh Castle are usually the responsibility of Scottish regiments or units based in Edinburgh. Occasionally units from Commonwealth militaries are given the honour. Vatican City The de facto military force of the Vatican City State is the Pontificia Cohors Helvetica ("Papal Swiss Cohort"). Popularly known as the Swiss Guard, this 135 strong unit is formed by unmarried Swiss Catholic former servicemen aged between 19 and 30 years, recruited through a special convention with the Swiss Government. While largely performing ceremonial honour guard duties with traditional weapons (halberds, partisans and swords), the Swiss Guard is also equipped with modern military light weapons and trained in proper military and security duties. The Guard provides one of two official procotol bands in the country. Oceania Australia The tri-service Federation Guard – consisting of members of the Australian Army, the Royal Australian Air Force and the Royal Australian Navy – provides the guard of honour for various ceremonies. It is the only military unit of its kind currently in the Australian Defence Force. All members of the guard are enlisted in their respective areas before volunteering for service in the guard. They are armed with L1A1 SLR rifles. Fiji Fijian Presidential Palace Guards serve as the official guard of honour unit of the President of Fiji. It is made up of members of all the different service branches of the Fiji Military Forces. It primarily serves its ceremonial duties at the Government House