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. Independent contract boards in Manitoba and Saskatchewan have been established in partnership with First Nation organizations to conduct a range of activities related to historic contracts. These include public education, research and facilitating discussions on contractual issues. The Vienna Convention on the Law of Treaties is the United Nations agreement which codifies the rules governing contractual relations between States. A party may also argue, without any express provision, that a contract should be terminated if circumstances have changed dramatically. Such a change is sufficient if it is unforeseen, if it undermines the “essential basis” of a party`s approval, if it radically alters the scope of commitments between the parties, and if the commitments still need to be fulfilled. . . .