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.
Former Presidents Act
Former presidents are entitled to medical treatment in military hospitals; they pay for this at interagency rates set by the Office of Management and Budget. Two-term presidents may buy health insurance under the Federal Employees Health Benefits Program; a GSA legal opinion ruled Jimmy Carter ineligible.