Twenty-second Amendment to the United States Constitution
As worded, the primary focus of the 22nd Amendment is on limiting individuals twice elected to the presidency from being elected again. Due to this, several issues could be raised regarding the amendment's meaning and application, especially in relation to the 12th Amendment, ratified in 1804, which states, "But no person constitutionally ineligible to the office of President shall be eligible to that of Vice-President of the United States". While it is clear that under the 12th Amendment the original constitutional qualifications of age, citizenship, and residency apply to both the president and vice president, it is unclear whether someone who is ineligible to be elected president could be elected vice president. Because of this apparent ambiguity, there may be a loophole in the 22nd Amendment whereby a two-term former-president could be elected vice president and then succeed to the presidency as a result of the incumbent's death, resignation, or removal from office (or even succeed to the presidency from some other stated office in the presidential line of succession).
President of Chile
Under the 1828 constitution, the President served for four years, without the possibility of immediate reelection for one more term. In 1833, the presidential period was changed to five years, with a possibility of immediate reelection for one more term, limited to two consecutive terms. Then by a constitutional reform in 1878, possibility for reelection became disallowed. Under the 1925 constitution, the President served for a six-year term, without the possibility of immediate reelection only.
In the original text of the 1980 constitution, the President served for an eight-year term without the possibility of immediate reelection. Some transitory disposals, fixed during the government of the general Augusto Pinochet, allowed the exceptional possibility of his reelection in the 1988 plebiscite. Then, in the transition to democracy the 1989 referendum established a first transitional four-year presidential term (1990–1994), followed by common eight-year terms, without the possibility of immediate reelection. However, in 4 March 1994 (a week before Eduardo Frei Ruiz-Tagle took office) the presidential period was reduced to a six-year term, without an immediate reelection.