Twenty-second Amendment to the United States Constitution
The amendment prohibits any individual who has been elected president twice from being elected again. Under the amendment, an individual who fills an unexpired presidential term lasting greater than two years is also prohibited from winning election as president more than once. Scholars debate whether the amendment prohibits affected individuals from succeeding to the presidency under any circumstances or whether it only applies to presidential elections.
Fourth Republic of Korea
The 1963 Constitution limited a president to two four-year terms. However, Park won the right to run for a third term in 1969 when the National Assembly, dominated by his allies in the Democratic Republican Party, amended the 1963 constitution to allow the incumbent president — Park himself — to run for three terms. He won a narrow victory over opposition candidate Kim Dae-jung.