the USA with a view to putting into effect their treaties on the limitation of underground nuclear tests and on nuclear explosions for peaceful purposes are important and should soon be followed by further agreements on the reduction of the number and yield of such tests. We are also in favour of preparing the ground in a multilateral framework for a comprehensive nuclear test ban. This is what pressure groups all over the world expect your Conference to do. The international seismic data exchange system for global test-ban monitoring developed by the Group of Scientific Experts has provided an important foundation for more substantial political advances. This has led to the German Democratic Republic taking part in the international experiments for the exchange of complete seismic registrations. Now the time has come for the Conference to start a comprehensive discussion about all issues involved in a test ban. We consider the convening for early next year of an Amendment Conference to the Partial Test Ban Treaty, which was signed in Moscow in 1963, to be an expression of the world-wide interest in a speedy termination of nuclear test explosions. This conference must lend momentum to the relevant activities on all levels. Progress in this direction would also go a long way towards strengthening the Treaty on the Non-Proliferation of Nuclear Weapons, whose Fourth Review Conference will soon start its work in Geneva. It is the first time that such a gathering will be held against a background of nuclear disarmament. I regard this as an omen of success. It should set the course for an extension of this essential treaty in five years' time. In many United Nations resolutions and declarations the international community has come out in favour of complementary disarmament talks at the bilateral, regional and global levels. However, a glaring contrast has become 
**Analysis**
This text appears to be discussing international relations and disarmament, specifically nuclear tests and the limitation of underground nuclear tests. It mentions treaties, conferences, and resolutions, indicating a focus on global governance and international cooperation. The text also references scientific and technological aspects, such as seismic data exchange and monitoring systems. Overall, the text's focus on global politics, international agreements, and scientific aspects suggests that it belongs to the categories related to international relations.

**Category**
International relations, Science and technology