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).
2022 German presidential election
Every member of the Federal Convention (members of the Bundestag and state electors, once they are elected by their respective state parliament) can propose candidates for the presidency. It is required that the President is a German citizen and at least 40 years old. Every candidate has to declare his consent to running. Candidates can be proposed before the Federal Convention and (theoretically) during the Convention before every ballot. If the President-elect is a member of a legislature or a government on federal or state level, he has to resign from that office before the start of his term. A sitting President is not allowed to run for a third "consecutive" term.