for action by the Conference on Disarmament, the nuclear-weapon States and other States for co-operation to promote the work towards a verifiable nuclear-test-ban treatyr towards establishing an international seismic monitoring network and initiating investigation of other measures to monitor and verify compliance with such a treaty; and called upon the Conference to report to the Assembly at its forty-fourth session on progress made (resolution 43164). At its forty-fourth session, a/ the General Assembly reaffirmed its conviction *hat a treaty to achieve the prohibition of all nuclear-test explosions by all States in all environments for all time id a matter of fundamental importance7 urged, therefore, that the following actions be taken in order that a comprehensive nuclear-test-ban treaty might be concluded at an early date: (a) the’ Conference on Disarmament should intensify its consideration of item 1 of its agenda, entitled “Nuclear-test ban”, and initiate substantive work on all aspects of a nuclear-test-ban treaty at the beginning of its 1990 session; (b) States members of the Conference on Disarmament, in particular the nuclear-weapon States, and all other States should co-operate in order to facilitate and promote such work; (c) the nuclear-weapon States , especially those which possoss the most important nuclear arsenals, should agree promptly to appropriate verifiable and militarily significant interim measures, with a view to realising a comprehensive nuclear-test-ban treatyt (d) those nuclear-weapon States which had not yet done so should adhere to the Treaty Banning Nuclear Weapon Tests in the Atmosphere, in Outer Space and under Water; also urged the Conference on Disarmament: (a) to take 241 References for the forty-fourth session (agenda item 52): (a) Report of the Conference on Disarmament: Supplement No. 27 (A/44/27): (b) Report of the First Com,nittee: A/44/774: (c) Resolution 44/107: I... A/45/100 English Page 148 immediate steps for the establishment, with the widest possible participation, of 