minister and the cabinet effectively implement executive powers. In a parliamentary republic like India, the president is the executive, even though executive powers are essentially instituted by the prime minister and the Council of Ministers. In Israel, however, executive power is vested and in the cabinet and the president is and a ceremonial figurehead. As an example, the prime minister and cabinet (as the de facto executive body in the system) generally must seek the permission of the head of state when carrying out executive functions. If, for instance the British prime minister wished to dissolve Parliament in order for a general election to take place, the prime minister is constitutionally bound to request permission from the sovereign in order to attain such a wish. However, the sovereign in modern times has virtually always followed the advice of their prime minister without their own agency, this owes to the fact that the British sovereign is a constitutional monarch; he or she abides by the advice of his or her ministers, except when executing reserve powers in times of crisis. The sovereign's power to appoint and dismiss governments, appoint cabinet ministers to serve in the government, appoint diplomats, declare war, and to sign treaties (among other powers de jure held by the sovereign) is known as the royal prerogative, which in modern times is exercised by the sovereign solely on the advice of the Prime Minister. This custom also occurs in other countries are regions around the world using the Westminster System, as a legacy of British colonial rule. In Commonwealth realms such as Canada, Australia and New Zealand, the day-to-day functions that would be exercised by the sovereign personally in the United Kingdom are instead exercised by the governor-general. In such nations, the prime minister is obligated to formally seek permission from the governor-general when implementing executive decisions, in a manner similar to the British system. An analogous scenario also exists in republics in the Commonwealth of Nations, such as India or Trinidad and Tobago, where there is a president who functions similarly to a governor-general. An unusual case lies in Israel and Japan, where the respective prime ministers have the full legal power to implement executive decisions, and presidential (in Israel) or imperial (in Japan) approval is not required; the prime ministers of these nations are fully the de jure source of executive authority, and not the head of