The president of the Bundestag is elected during the constituent session of each election period after the
federal elections or in a later session, if the office has fallen vacant, by all members of the Bundestag. The president has to be a member of the Bundestag. Until the election of the president, the session is chaired by the
father of the House, the so-called . Since 2017, this has been the longest serving member of the Bundestag; in 1949–2017, it was the oldest member of the Bundestag by age. Usually, the president of the Bundestag is a member of the largest parliamentary group. This
constitutional convention had emerged already in times of the
Weimar Republic, but this is not required by law. The term ends with the election period, and there is no provision for an early removal. The term of the president can only end prematurely if they resign the position, leaves the Bundestag or dies. They can be re-elected in the next election period provided they become a member of the Bundestag again. Traditionally, the president of the Bundestag is proposed by the largest group, and elected uncontested. The only exception so far has been in 1954 after the unexpected death of
Hermann Ehlers (CDU). Nominated by
Hans Reif (
Free Democratic Party (FDP)),
Ernst Lemmer (CDU) stood against the "official"
CDU/
CSU candidate,
Eugen Gerstenmaier, and lost after three ballots with a difference of 14 votes (204 for Gerstenmaier, 190 for Lemmer, 15 abstentions). == Presidium of the Bundestag ==