A German loses his or her citizenship upon acquiring foreign citizenship where such acquisition results from an application filed by the German concerned or his or her legal representative, whereas the represented person suffers such loss only if the qualifying conditions for application for release from citizenship apply as stipulated in Section 19. The loss under sentence 1 does not take effect if a German acquires the citizenship of another member state of the European Union, of Switzerland or of a state with which the Federal Republic of Germany has signed a treaty under Section 12 (3).