Editing Prince (section)

====Prince exercising head of state's authority====
Various monarchies provide for different modes in which princes of the dynasty can temporarily or permanently share in the style and/or office of the monarch, e.g. as [[regent]] or [[viceroy]].

Though these offices may not be reserved legally for members of the ruling dynasty, in some traditions they are filled by dynasts, a fact which may be reflected in the style of the office, e.g. "[[Napoleon III#Prince-President (1848–1851)|prince-president]]" for [[Napoleon III]] as French [[head of state]] but not yet emperor, or "prince-lieutenant" in [[Luxembourg]], repeatedly filled by the [[crown prince]] before the grand duke's abdication, or in form of {{Lang|la|[[consortium imperii]]}}.

Some monarchies even have a practice in which the monarch can formally abdicate in favour of his heir and yet retain a kingly title with executive power, e.g. ''Maha Upayuvaraja'' ([[Sanskrit]] for ''Great Joint King'' in [[Cambodia]]), though sometimes also conferred on powerful regents who exercised executive powers.