Explanation:
The authority of a leader derived from a constitution is legal-rational authority. According to the German sociologist Max Weber, there are three types of authority: traditional, charismatic and legal-rational. Legal-rational authority is based on the belief in the legitimacy of the legal order and the right of those in positions of authority to issue commands. In a modern state, the authority of political leaders is derived from the constitution and the laws of the land, and it is exercised in accordance with established legal procedures.