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Federal Constitutional Court ("Bundesverfassungsgericht") is the supreme constitutional court and highest court in Germany.
The Bundestag (lower chamber of parliament) elects judges to the court by secret ballot in the plenum, requiring a candidate to get a two-thirds majority, that has to equal at least an absolute majority of members of the Bundestag.
The judges are elected for a 12-year term, but they must retire upon reaching the age of 68. A re-election is not possible. A judge must be at least 40 years old and must be a well-trained jurist.
Three out of eight members of each of the two senates have served as a judge on one of the federal courts (Those supreme courts are the highest courts of the relevant jurisdiction: Federal Court of Justice, Federal Administrative Court, Federal Finance Court, Federal Labour Court, Federal Social Court.). Of the other five members of each senate, most judges previously served as an academic jurist at a university, as a public servant or as a lawyer.