to support the draft mandate submitted by the Group of 21 in document CD/520. Time is more than ripe for negotiations. In 1985, the Soviet Union proposed the basic provisions of a CTB. They offer a sound foundation to conduct negotiations on. The same year, Sweden submitted a draft treaty, which contains valuable ideas. 4. On the basis of those proposals as well as of the discussions on that subject­ matter held since years within the Conference on Disarmament, its predecessors and in other fora, the main subjects for the negotiations in an ad hoc committee are pertinent. They could be structured in the following way: 1. Scope of the treaty - Comprehensive ban on nuclear-weapons tests in all environments ; - Question of nuclear explosions for peaceful purposes. 2. Main obligations of the States Parties 5. Implementation of the treaty - National measures for implementation; - National means of verification of compliance; - International means of verification including co-operation in the field of seismic monitoring, on-site inspection, etc. 4. Entry into force, amendments to the treaty and other questions CD/629 page 3 The unilateral moratorium on all nuclear tests announced by the Union of Soviet Socialist Republics is a most widely supported step. Especially the United States of America is requested to join the Soviet moratorium. An immediate step to end nuclear testing would be the proclamation by all nuclear-weapon States of a moratorium on all nuclear explosions until a CTB-Treaty will be concluded. The nuclear-weapon countries concerned are requested to review their positions and to come up with a clear commitment to negotiations, taking into account the urgent need of a treaty on the complete and general prohibition of nuclear-weapon tests, as well as the considered view of the overwhelming majority of States.
**Analysis**
This text appears to be a diplomatic document discussing the prohibition of nuclear weapons tests, which is a pressing international issue related to disarmament and peace. The text references previous proposals, negotiations, and moratoriums, indicating a focus on international relations and global security.

**Category**
International relations, Science and technology