In August 1972, the U.S. Senate overwhelmingly approved the agreements. SALT-I, as it has been called, served as the basis for all subsequent arms restrictions talks. The SALT-1 Treaty defined agreement in three areas: Of the resulting set of agreements (SALT I), the most important were the Treaty on Combating Ballistic Missile Systems (ABM) and the Interim Agreement and Protocol on the Limitation of Strategic Offensive Weapons. Both were signed on 26 May 1972 by President Richard M. Nixon for the United States and Leonid Brezhnev, General Secretary of the Communist Party of the Soviet Union, for the USSR at a summit in Moscow. The SALT II treaty banned new missile programs (a new missile defined as a missile whose key parameters are 5% better than the currently deployed missiles), so both sides were forced to limit their development and the construction of new types of strategic missiles such as the development of additional icBM fixed launchers.