The conclusion of a framework agreement can move the legislative power of states to a plenary session and shift the basis for approving the new standards and standards obtained through their negotiations.  The practice of concluding framework agreements was born in the 1950s with an asylum agreement between Colombia and Peru.  A number of international agreements are called framework agreements: a framework agreement is not an interim agreement. It is more detailed than a statement of principle, but less than a full-fledged contract. Its aim is to find the fundamental compromises necessary to enable the parties to develop and conclude a comprehensive agreement that ends the conflict and creates lasting peace.  Companies, in particular the contracting powers, may enter into framework agreements with one or more suppliers that impose the conditions applicable to each subsequent contract and provide for the selection and appointment of a contractor by referring directly to agreed terms or by organising a selection procedure that invites only the partners to the framework agreement to present specific trade proposals.  In the context of contracting, a framework agreement is an agreement between one or more companies or organisations «aimed at setting the conditions for contracts to be spent over a specified period of time, including the price and, if applicable, the expected quantity.»  In the context of the negotiations, a framework agreement is an agreement between two parties, which acknowledges that the parties have not reached final agreement on all issues relevant to the relations between them, but that they have agreed on enough issues to move relations forward, agreeing further details in the future. Senator George J. Mitchell explained the efforts made to reach an agreement between Israel and Palestine: in the public sector, there are a number of central public procurement entities, whose objectives are the creation and management of framework agreements in accordance with EU public procurement directives  and which are available for use by designated public bodies. In the United Kingdom, for example, crown commercial service, municipal consortia such as Eastern Shires Purchasing Organisation (ESPO) and Yorkshire Purchasing Organisation (YPO) and consortia, in the areas of higher education and training: APUC (in Scotland), Crescent Purchasing Consortium (CPC),  London Universities Purchasing Consortium (LUPC), North Eastern Universities Purchasing Consortium (NEUPC),  North Western Universities Purchasing Consortium (NWUPC)  Under international law, such an agreement between countries or groups may recognize that they cannot reach full agreement on all issues, but that they are ready to create a structure to resolve certain differences of opinion. .