A/68/283 in the construction and operation of detention centres for migrants is of great concern to the Special Rapporteur, who has already made his views clear on the utility of migration detention (see A/HRC/20/24). 60. IOM is also involved in other aspects of migration, such as programmes on migrants’ health and anti-trafficking, and it has developed migrants’ rights training programmes for stakeholders. As IOM is project-based and its work donor-driven, its agenda is largely decided by its member States. The Special Rapporteur has met with IOM staff, both at headquarters and in the field, who take the human rights of migrants very seriously and do good and important work in that regard. However, the mandate and funding of IOM pose structural problems with regard to fully adopting a human rights framework for its work: both would need to be revised if the organization is to become a key player in the promotion and protection of the human rights of migrants. 61. The fact that the mandate of IOM is not supportive of human rights is of concern for the whole United Nations system, as IOM is part of the Global Migration Group and the United Nations country teams in many countries and is often mistakenly believed, including by migrants themselves, to be a United Nations agency. 3. Governance at the regional level 62. The unprecedented level of international migration in recent years, coupled with the lack of a global framework on migration, has contributed to enhanced activity at the regional level, including migration-related agreements within regional organizations or economic communities. Another increasingly used instrument at the regional level are regional consultative processes on migration. (a) Regional organizations: focus on the European Union 63. Economic communities all over the world have some form of agreement or intention on the free movement of people within their region. This includes the Economic Community of West African States, the Commonwealth of Independent States and the Common Market of the South (MERCOSUR). The European Union, with its 28 member States, has the most elaborate system of all the regional economic communities and thus provides one of the most developed examples of regional migration governance. 64. The Treaty of Rome provided the right to free movement of workers within the European Economic Community, thus recognizing the economic benefits of free movement. The European Union’s expansion in 2004, including to Eastern Europe, proved that free movement is also possible for countries with different levels of economic development, enhancing the benefits of mobility for all concerned. 65. Since its beginnings, the European Union has expanded considerably, both in terms of number of member States and mandate. With the entry into force of the 1999 Treaty of Amsterdam, migration and asylum policies including the Schengen acquis (the creation of a common external border with free movement inside the border) were officially incorporated into the legal framework of the European Union. 66. The European Union makes a distinction between European Union nationals, who have freedom of movement inside the whole territory and are thus not considered migrants, and “third-country nationals”. Several European Union 12/26 13-42115