ACDA's position eventually prevails in 1990. I Treaty to the newly independent states, leading to the signing of the Lisbon Protocol in 1992. The convention is signed in 1993. 1993 ACDA successfully leads efforts within the U.S. government to pursue a Comprehensive Test Ban Treaty to prohibit all nuclear weapons tests, without a threshold, and to continue the congressionally mandated U.S. moratorium on nuclear testing until the CTBT is signed. 1995 ACDA, working with the U.S. National Security Adviser, promotes U.S. adoption of a zero-yield Comprehensive Test Ban Treaty.
Language prohibiting exceptions to the ban is an important negotiating tool.
The agency negotiates successfully agreements expanding participation in the ABM Treaty and modifications distinguishing between tactical ABM systems the treaty does not cover and those strategic ABM systems it does. ACDA leads U.S. government efforts and negotiates for the United States the Comprehensive Test Ban Treaty, banning all nuclear tests. The treaty is signed in September 1996.