 The Regency Acts allow for regencies in the event of a monarch who is a minor or who is physically or mentally incapacitated. When a regency is necessary, the next qualified individual in the line of succession automatically becomes regent, unless they themselves are a minor or incapacitated. Special provisions were made for Queen Elizabeth II by the Regency Act 1953, which stated that the Duke of Edinburgh (the Queen's husband) could act as regent in these circumstances.
