Contracts can be compared in bulk to contracts, as the parties are willing to make binding commitments with each other.   Treaties differ considerably in content and complexity and can address a large number of issues, such as. B territorial borders, trade and commerce, political alliances and more. There are three ways to amend an existing treaty. First, a formal amendment requires States parties to go through the ratification process again. The renegotiation of contractual provisions can be lengthy and time-consuming, and often some parties to the original treaty do not become parties to the amended treaty. In determining the legal obligations of States, a party to the original treaty and a party to the amended treaty, States are bound only on the conditions on which they have both agreed. Contracts may also be amended informally by the council of contractual experts if the amendments are only procedural, technical amendments to the international law of usage may also modify a treaty if the conduct of the State demonstrates a new interpretation of the legal obligations under the treaty. Minor corrections may be made to a contract by a report; However, minutes are generally reserved for amendments aimed at correcting obvious errors in the adopted text, i.e. when the adopted text does not adequately reflect the intention of the parties who accept it. The Australia Group (AG) is an informal forum of countries which, by harmonising export controls, aims to ensure that exports do not contribute to the development of chemical or biological weapons.