as a major international political event. All parties to the Treaty should do their utmost to bring the fourth review conference to a successful conclusion. It is extremely important that the NPT, the corner-stone of the international non-proliferation régime, should be further strengthened. In order to facilitate the success of the review conference in 1990 and the prolongation of the Treaty in 1995, I strongly urge the nuclear-weapon States to continue nuclear disarmament and move towards a test ban. We have to admit that the NPT is not yet a universal treaty. Two nuclear-weapon Powers and several other States with major unsafeguarded nuclear facilities have so far chosen to remain outside it. Despite this, the NPT, with its more than 140 States parties, is one of the most important post-war treaties in the disarmament field. Sweden again urges all States which have not yet done so to accede to this treaty. International security would be greatly strengthened, and our planet would become a less dangerous place, if all States joined forces to prevent the further proliferation of nuclear weapons. In this context, I should like to emphasize the following issues. States which have abstained from nuclear weapons by adhering to an international, legally binding commitment have a legitimate right to receive binding assurances from the nuclear-weapon States that they will not be attacked or threatened with such weapons. Existing assurances, with their reservations and ambiguities, do not meet this need. With the fourth review conference in mind, Sweden would welcome a constructive initiative on negative security assurances by the nuclear-weapon States. In this context, I would also like to note the interesting proposal made by Nigeria. CD/PV.555 8 (Mrs. Theorin. Sweden ) All production of new nuclear material for weapons purposes must cease. In order to make an undertaking of such cessation credible, all future 
**Analysis**
The text is a speech by the representative of Sweden at the United Nations, discussing the importance of strengthening the Non-Proliferation Treaty (NPT) and addressing issues related to nuclear disarmament and security assurances. The language used is diplomatic and focused on international relations, indicating that the topic is not related to economic or social issues, but rather to international politics and security.

**Category**
International relations, Science and technology