Presidential Succession: If the President is ousted from office, passes away, or steps down, the Vice President ascends to the presidency. This guarantees continuity in governance.
Vice Presidential Vacancy: When there is an opening in the Vice Presidency, the President puts forward a new Vice President who must be ratified by a majority vote in both chambers of Congress.
Presidential Disability: The President can willingly delegate authority to the Vice President by announcing an incapacity to fulfill responsibilities. The Vice President then serves as President until the President proclaims they are capable of resuming their responsibilities.