In Jamaica's constitutional system, one of the main duties of the Crown is to appoint a prime minister, who thereafter heads the Cabinet and advises the monarch and Governor-General on how to execute their executive powers over all aspects of government operations and foreign affairs; this requirement is, unlike in other Commonwealth realms where it is a matter of convention, constitutionally enshrined in Jamaica. Though the monarch's power is still a part of the executive processthe operation of the Cabinet is technically known as the "Queen-in-Council" (or "Governor-in-Council")the advice tendered is typically binding. Since the death of Queen Anne in 1714, the last monarch to head the British Cabinet, the monarch "reigns" but does not "rule". This means that the monarch's role, and thereby the viceroys' role, is almost entirely symbolic and cultural, acting as a symbol of the legal authority under which all governments and agencies operate, while the Cabinet directs the use of the Royal Prerogative, which includes the privilege to declare war, maintain the Queen's peace, and direct the actions of the Jamaica Defence Force, as well as to summon and prorogue parliament, and call elections. However, it is important to note that the Royal Prerogative belongs to the Crown, and not to any of the ministers, though it may sometimes appear that way, and the royal figures may unilaterally use these powers in exceptional constitutional crisis situations. There are also a few duties which must be specifically performed by, or bills that require assent by, the Queen. These include signing the appointment papers of Governors-General, the confirmation of awards of Jamaican honours system, and the approval of any change in her Jamaican title.