could freely deploy troops in those areas, with the exception of nuclear weapons. For the duration of the Soviet presence, Allied troops would remain stationed in Berlin upon Germany's request. Germany undertook efforts to reduce its armed forces to no more than 370,000 personnel, no more than 345,000 of whom were to be in the Army and the Air Force. These limits would commence at the time that the Treaty on Conventional Armed Forces in Europe would enter into force, and the treaty also took note that it was expected that the other participants in the negotiations would "render their contribution to enhancing security and stability in Europe, including measures to limit personnel strengths". Germany also reaffirmed its renunciation of the manufacture, possession of, and control over nuclear, biological, and chemical weapons, and in particular, that the Nuclear Non-Proliferation Treaty would continue to apply in full to the unified Germany (the Federal Republic of Germany). No foreign armed forces, nuclear weapons, or the carriers for nuclear weapons would be stationed or deployed in six states (the area of Berlin and the former East Germany), making them a permanent Nuclear-Weapon-Free Zone. The German Army could deploy conventional weapons systems with nonconventional capabilities, provided that they were equipped and designed for a purely conventional role. Germany also agreed to use military force only in accordance with the United Nations Charter. Future territorial claims Another of the treaty's important provisions was Germany's confirmation of the by now internationally recognised border with Poland, and other territorial changes in Germany that had taken place since 1945, preventing any future claims to lost territory east of the Oder–Neisse line (see former eastern territories of Germany). The treaty defined the territory of a 'united Germany' as being the territory of East Germany, West Germany, and Berlin, prohibiting Germany from making any future territorial claims. Germany also agreed to sign a separate treaty with Poland reaffirming the present common border, binding under international law, effectively relinquishing these territories to Poland. This was done on 14 November 1990, with the signing of the German–Polish Border Treaty. Furthermore, the Federal Republic was required by the treaty to amend its Basic Law so as to be constitutionally prohibited from accepting any application for incorporation into Germany from territories outside of East Germany, West Germany, and Berlin. Although the treaty was signed by West and East Germany as separate sovereign states, it