History of Germany (1945–90) on 13 February 1990. The six foreign ministers met four times in the ensuing months in Bonn (5 May), Berlin (22 June), Paris (17 July), and Moscow (12 September). The Polish Foreign Minister participated in the part of the Paris meeting that dealt with the Polish-German borders. Overcoming Soviet objections to a united Germany's membership in NATO was of key importance. This was accomplished in July when the alliance, led by President George H.W. Bush, issued the London Declaration on a transformed NATO. On 16 July, President Gorbachev and Chancellor Kohl announced the agreement in principle on a united Germany
Chancellor of Germany (1949–present) term in office ends or if they resign, the Bundestag has to elect a new Chancellor. The President of Germany may ask the former Chancellor to act as Chancellor until a new office holder is elected, but if they are unwilling or unable to do so, the President may also appoint the Vice Chancellor as Acting Chancellor until a successor is elected. This has happened once: On 7 May 1974 Chancellor Willy Brandt resigned as a consequence of the Guillaume Affair, an espionage scandal. In his letter of resignation to President Gustav Heinemann he wrote: President Heinemann followed the request.