Treaty on European Union: agreement concluded in 1991 in the Dutch city of Maastricht, in which the Member States of the European Union agreed on plans for their future, including economic union and the introduction of the single currency. It entered into force in 1993. A bilateral agreement or bilateral activity is an agreement in which two groups or two countries participate In addition to treaties, there are other, less formal international agreements. These include efforts such as the Proliferation Security Initiative (PSI) and the G7 Global Partnership Against the Spread of Mass Destruction. Although the PSI has a “Declaration of Prohibition Principles” and the G7 Global Partnership, several G7 leaders` declarations, neither has a legally binding document, which sets out specific commitments and is signed or ratified by member states. United Nations Convention on Contracts for the International Sale of Goods: a treaty on the unification of international trade law concluded in 1980. It is informally known as the Vienna Convention. Participants in the Australian group, by coordinating export controls, assist countries in meeting their obligations under the Chemical Weapons Convention and the Biological and Toxin Weapons Convention to the full extent possible. Formally, the opportunity for a country to formally join a group of countries or to accept an agreement to formally agree on a close relationship with another country or organization, a formal agreement between governments of different countries on how to behave among themselves or vis-à-vis the populations of their country, an agreement between two or more people; Groups or countries from which they undertake to cooperate to achieve results Under international law, a treaty is any legally binding agreement between States (countries). . . .