Another important incompatibility is based on the separation of powers. A representative who is appointed as a minister ceases to sit in the Chamber of Representatives and is replaced for as long as he or she is a minister, but if that individual resigns as a minister, he or she can return to the Chamber, in accordance with Article 50 of the Belgian Constitution. A representative cannot be a civil servant or a member of the judiciary at the same time, however, a civil servant who is elected to the Chamber is entitled to political leave and doesn't have to resign as a civil servant. It is also not possible to be a member of the Federal Parliament and a Member of the European Parliament at the same time.