U.S.-RUSSIAN WYOMING MEMORANDUM OF UNDERSTANDING
ON CHEMICAL WEAPONS
The Memorandum of Understanding (MOU) on chemical weapons signed by then Secretary of
State James Baker and then Soviet Foreign Minister Edward Shevardnadze in Jackson Hole,
Wyoming on September 23, 1989, provides for a bilateral verification experiment and data
This agreement was proposed by the United States and has been a goal of U.S. policy since 1984.
It reflects an effort by the United States and the Russian Federation to facilitate the process of
negotiation, ratification and implementation of the Chemical Weapons Convention, a
comprehensive, effectively verifiable and truly global ban on chemical weapons.
The experiment and data exchange is made up of two phases.
Phase I features:
- The exchange of general data on the sides' chemical weapons capabilities.
- Visits to relevant military and civil facilities chosen by the host country.
- Phase I activities were completed in February 1991.
Phase II features:
The MOU provides that both sides can meet periodically to ask questions about data exchanged
and resolve ambiguities and concerns. Experience gained during the bilateral inspections contributed to the work of the Preparatory Commission of the Chemical Weapons Convention in
The Hague, the Netherlands.
- The signature by both sides of updated implementation documents in January 1994 in Moscow.
- The exchange of detailed data on the sides' chemical weapons capabilities. This exchange
was completed in June 1994.
- On-site inspections to help confirm the data declarations.
- Allowed each side to conduct five inspections of facilities chosen from a list of sites
declared by the other.
- Of the five inspections allowed under Phase II, two were routine inspections, one was
designated as a trial challenge inspection, and the remaining two were challenge