The Monarchy of the United Kingdom (commonly referred to as the British monarchy) is the constitutional monarchy of the United Kingdom and its overseas territories. The present monarch, Elizabeth II, has reigned since 6 February 1952. She and her immediate family undertake various official, ceremonial and representational duties. As a constitutional monarch, the Queen is limited to non-partisan functions such as bestowing honours. Though the ultimate executive authority over the government of the United Kingdom is still by and through the monarch's royal prerogative, in practice these powers are only used according to laws enacted in Parliament or within the constraints of convention and precedent.