73. In 1972, the first round of negotiations on strateglc arms limitation lrasconcluded by the SALT I agreements, which include the anti-ballistic missite (ABM)Treaty and the Interin Agreement on Certain Iqeasures with Respect to the LimitaEionof Stragtegic Offensive Arms. In 1973, the Soviet Union and the United Statesentered into the Agreement on the Prevent.ion of Nuclear War and conmittedthemselves to make the removal of the danger of nuclear war an objective of theirpolicies. Towards that end, they agreed that they would act in such a manner as Eoprevent the development of situations capable of causing a dangerous exacerbationof their relations, to avoid nilit.ary confrontations, and to exclude the outbreakof nuclear war between them and between either of them and other countries. Theyfurther agreed that. each would refrain from the threat or use of force against eachother, against the allies of the ot.her Party and against other countries, incircumstances which might endanger int,ernational peace and security and lhat. Eheywould be guided by those considerat.ions in the forrnulation of their foreignpolicies and in their act.ions in the field of international relations. If at anytime there should arise the risk of a nuclear conflict, urgent consuLtat.ions shouldbe held imrnediately and every effort should be made to avere the risk. Theagreement further stipulates that not.hing in it shall affect formal allianceobligations or the inherent right of individual or collective self-defence asenvisaged by Article 51 of the charter of the united Nations.A/ 40 / 498 EngI ish Page 22 74. Subsequently, the Treaty on the tirnitation of Underground Nuclear Weapon Tests and the Treaty on Underground Nuclear Explosions for Peaceful Purposes between the United states and the Soviet Union were signed in 1974 and in 1976, respectively. Neither of these Treaties has yet been ratified, though the parties have repeatedly declared that they will abide by their provisions. The 1974 threshold test-ban Treaty prohibits all underground test,s wiEh a yield of more than 150 kilotons.Testing is limited to certain sites, and the Treaty provides for the exchange of technical data to facilitate mutual seismic verification. The Treaty also commitsthe parties to continue negotiations for a comprehensive test ban. The 1975 Treatyprohibits individual nuclear explosions of more than 150 kilotons or a series ofexplosions tot.alling more than 1,500 kilotons. In 1979, t,he Soviet Union and the UniEed States signed at Vienna the Treaty on the Limitation of Offensive Arms (SALT II). Although the Treaty has not, been ratified, the parties have unilaterally stated t.hat they would abide by its provisions so long as the other
**Analysis**
The text appears to be discussing international agreements and treaties related to nuclear weapons and disarmament. It mentions specific agreements and treaties, such as the SALT I and SALT II agreements, the Treaty on the Prevention of Nuclear War, and the Treaties on Underground Nuclear Weapon Tests and Explosions. The text also touches on the themes of international relations, peace, and security.

**Category**
International relations, Science and technology