A/65/262 and is promoted in close cooperation with UNICEF, OHCHR, the Committee on the Rights of the Child and the Special Rapporteur on the sale of children, child prostitution and child pornography. The goal of universal ratification has been widely endorsed by high-level international conferences, including the Third World Congress against Sexual Exploitation of Children and Adolescents (Rio de Janeiro, 2008), and is supported by international human rights bodies and a wide network of civil society organizations. 36. During this two-year campaign, the Special Representative on violence against children will promote global adherence to the Optional Protocol on the Sale of Children, Child Prostitution and Child Pornography. This protocol is in force in 137 countries, and more than 80 per cent of those that have not yet ratified it are parties to the International Labour Organization (ILO) Convention on the Worst Forms of Child Labour, a treaty with legal obligations to fight the sexual exploitation of children. Several of those countries have also formally committed to ratify the Protocol, including in the context of the Universal Periodic Review of the Human Rights Council. 37. Achieving progress in this area is vital. Every year, millions of children are trafficked, enslaved through sexual exploitation, arranged marriage, illegal adoption or forced labour. In its most recent global report, ILO recognizes that 115 million children are victims of hazardous work; and the sale and sexual exploitation of children also figure prominently among the worst forms of child labour. 38. The universal ratification of the Protocol will provide a shared normative foundation to guide States’ concerted action, to prevent loopholes in child protection systems and to fight impunity within and across borders, leaving no safe havens for perpetrators. 39. In her collaboration with United Nations organizations, the Special Representative on violence against children has built upon existing inter-agency mechanisms, in particular the Inter-Agency Working Group on Violence against Children, of which ILO, OHCHR, UNICEF and the World Health Organization (WHO) are core members. The Inter-Agency Working Group is a critical forum for consultation, promotion of policy formulation and mainstreaming of concerns related to violence against children within the United Nations system’s agenda. 40. The Special Representative has maintained very close cooperation with the core members of the Inter-Agency Working Group, having held very fruitful bilateral discussions and working-level meetings in Geneva. The Special Representative welcomes the critical advice received and the support provided, which have been of decisive relevance for the shaping of her mandate and the missions she has conducted. 41. UNICEF provides administrative support to the Office of the Special Representative and has established a trust fund for the financial contributions provided in support of her mandate. Protection of children from violence is a key dimension of the mandate of UNICEF, and the Special Representative has been associated with important initiatives promoted by that organization. 42. In the framework of its 2008 Child Protection Strategy, UNICEF supports the follow-up to the United Nations study by strengthening child protection systems and promoting social change in attitudes towards children. The Special Representative participated in important discussions on the implementation of the UNICEF Strategy 10-47898 9