A/RES/54/53 Page 3 Recognizing that negotiations for the conclusion of an international agreement or agreements to prevent an arms race in outer space remain a priority task of the Ad Hoc Committee and that the concrete proposals on confidence-building measures could form an integral part of such agreements, 1. Reaffirms the importance and urgency of preventing an arms race in outer space, and the readiness of all States to contribute to that common objective, in conformity with the provisions of the Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space, including the Moon and Other Celestial Bodies;1 2. Reaffirms its recognition, as stated in the report of the Ad Hoc Committee on the Prevention of an Arms Race in Outer Space, that the legal regime applicable to outer space by itself does not guarantee the prevention of an arms race in outer space, that this legal regime plays a significant role in the prevention of an arms race in that environment, that there is a need to consolidate and reinforce that regime and enhance its effectiveness, and that it is important to comply strictly with existing agreements, both bilateral and multilateral; 3. Emphasizes the necessity of further measures with appropriate and effective provisions for verification to prevent an arms race in outer space; 4. Calls upon all States, in particular those with major space capabilities, to contribute actively to the objective of the peaceful use of outer space and of the prevention of an arms race in outer space and to refrain from actions contrary to that objective and to the relevant existing treaties in the interest of maintaining international peace and security and promoting international cooperation; 5. Reiterates that the Conference on Disarmament, as the single multilateral disarmament negotiating forum, has the primary role in the negotiation of a multilateral agreement or agreements, as appropriate, on the prevention of an arms race in outer space in all its aspects; 6. Invites the Conference on Disarmament to complete the examination and updating of the mandate contained in its decision of 13 February 19924 and to establish an ad hoc committee as early as possible during the 2000 session of the Conference on Disarmament; 7. Recognizes, in this respect, the growing convergence of views on the elaboration of measures designed to strengthen transparency, confidence and security in the peaceful uses of outer space; 8. Urges States conducting activities in outer space, as well as States interested in conducting such activities, to keep the Conference on Disarmament informed of the progress of bilateral and multilateral negotiations on the matter, if any, so as to facilitate its work; 9. Decides to include in the provisional agenda of its fifty-fifth session the item entitled “Prevention of an arms race in outer space”. 69th plenary meeting 1 December 1999