A/HRC/36/51 77. In Mexico, Central America and the Caribbean, regional treaties do not include specific obligations for countries of transit or destination with respect to guarantees for children in migration processes, such as the prohibition of detention, due process and the principle of the best interests of the child. 72 Regional bodies such as the Central American Integration System and the Central American Commission of Migration Directors 73 have been crucial to the dialogue and the implementation of regional decisions on an approach to migration. However, although regional agreements on free movement across borders (the Central America-4 single Central American visa) have favoured mobility within the region, efforts are needed for the effective protection of rights and the realization in society of Central American migrant policies and actions. 78. In 2014, the Inter-American Court of Human Rights issued advisory opinion OC21/14 on rights and guarantees of children in the context of migration and/or in need of international protection, in response to a request made in 2011 by the member States of the Southern Common Market at the time, namely Argentina, Brazil, Paraguay and Uruguay. This was the first time that a group of States had appeared before the inter-American system of human rights with a common position on an issue of concern for the protection of human rights in the region. The advisory opinion is a regional achievement that provides innovative guidelines for defining and expanding the scope of the rights and interests of migrant children. 79. In Europe, there is some institutional collaboration for the purpose of protecting unaccompanied child asylum seekers. The Dublin III regulation on family reunification of the European Union establishes collaboration on a case-by-case basis. 80. In Southern Africa, efforts have been stepped up with the implementation of joint projects cutting across three Southern African countries. For example, the Destination Unknown campaign, which is being implemented in Mozambique, South Africa and Zimbabwe, is funded by Terres des Hommes Germany. However, regional efforts and coordination need to develop significantly in order to protect unaccompanied migrant children.74 VII. Role of civil society 81. Many countries with serious migration issues have strengthened the relationship between government and civil society. In this regard, States recognize the work that civil society organizations carry out in order to serve, assist and guide migrant children in the fulfilment of their primary or basic needs, as well as the promotion of their human rights. On the other hand, some reports, such as the one presented by Caritas Myanmar, still perceive a lack of collaboration between government organizations, international and national NGOs and United Nations organizations. 82. Civil society plays a prominent role in uncovering the problem of insecurity, providing services and organizing institutional networks with relevant experience, as well as serving as a watchdog to ensure that States guarantee all the fundamental rights of unaccompanied migrant children. 83. Civil society intervenes in the prevention of, and response to, child abuse, neglect, violence and exploitation; it ensures that children have legal documentation and that their specific needs for durable solutions are met in their best interests. Many organizations provide education and medical assistance, psychosocial support, food, shelter and water and sanitation services. Some NGOs have even brought legal action in the case of severe violations by government agencies. 84. International NGOs and global networks such as Casa Alianza and End Child Prostitution in Asian Tourism promote training programmes for staff and experts from the 72 73 74 14 Source: Fray Matías de Córdova Human Rights Centre. The Commission is an initiative of the Regional Conference on Migration. Source: Terre des Hommes Zimbabwe.