of four years by days. Also in 1937, the vice president's swearing-in ceremony was held on the Inaugural platform on the Capitol's east front immediately before the president's swearing in. Up until then, most vice presidents took the oath of office in the Senate chamber, prior to the president's swearing-in ceremony. Although the Constitution contains the specific wording of the presidential oath, it contains only a general requirement, in ArticleVI, that the vice president and other government officers shall take an oath or affirmation to support the Constitution. The current form, which has been used since 1884 reads: Term of office The term of office for both the vice president and the president is four years. While the Twenty-Second Amendment sets a limit on the number of times an individual can be elected to the presidency (two), there is no such limitation on the office of vice president, meaning an eligible person could hold the office as long as voters continued to vote for electors who in turn would reelect the person to the office; one could even serve under different presidents. This has happened twice: George Clinton (1805–1812) served under both Thomas Jefferson and James Madison; and John C. Calhoun (1825–1832) served under John Quincy Adams and Andrew Jackson. Additionally, neither the Constitution's eligibility provisions nor the Twenty-second Amendment's presidential term limit explicitly disqualify a twice-elected president from serving as vice president, though it is arguably prohibited by the last sentence of the Twelfth Amendment: "But no person constitutionally ineligible to the office of President shall be eligible to that of Vice-President of the United States." As of the 2020 election cycle, however, no former president has tested the amendment's legal restrictions or meaning by running for the vice presidency. Impeachment Article II, Section 4 of the Constitution allows for the removal of federal officials, including the vice president, from office for "treason, bribery, or other high crimes and misdemeanors". No vice president has ever been impeached. Vacancies Prior to the ratification of the Twenty-fifth Amendment in 1967, no constitutional provision existed for filling an intra-term vacancy in the vice presidency. As a result, when one occurred, the office was left vacant until filled through the next ensuing election and inauguration. Between 1812 and 1965, the vice presidency was vacant on sixteen occasions, as a result of seven deaths, one resignation, and eight cases of the vice president succeeding