Monarch Elizabeth II as the reigning constitutional monarch. Tonga is the only remaining sovereign kingdom in Oceania. It has had a monarch since the 10th century and became a constitutional monarchy in 1875. In 2008, King George Tupou V relinquished most of the powers of the monarchy and the position is now largely ceremonial. In New Zealand the position of Māori King was established in 1858. The role is largely cultural and ceremonial, and has no legal power. Uvea, Alo and Sigave in the French territory of Wallis and Futuna have non-sovereign elective monarchs. The usage and meaning of a monarch's
Tongan paʻanga same approximate size as earlier dated coins. In 2011, commercial demand for 20 and 50 seniti prompted these denominations to be issued featuring the effigy of Tupou IV posthumous, who had died in 2006. A new obverse design for George Tupou V had not yet been made or selected at this time, possibly due to increased health concerns regarding the latter monarch, who died in March 2012. For a brief period, some of the higher denomination coinage from the 1967-1968 series was "countermarked" with commemoration stamps that were added to the coin after being struck. The most distinct of these