(b) The report of the Working Group on the elaboration of a draft optional protocol to the Convention on the Rights of the Child on the sale of children, child prostitution and child pornography on its fifth session (E/CN.4/1999/74); (c) The United Nations Educational, Scientific and Cultural Organization expert meeting, held in Paris on 18 and 19 January 1999, entitled “Sexual Abuse of Children, Child Pornography and Paedophilia on the Internet: An International Challenge” and its declaration and action plan, and encourages follow­up in cooperation with the Special Rapporteur; 10. Reaffirms the obligation of States parties to prevent the abduction of, the sale of or traffic in children for any purpose or in any form and to protect the child from all forms of sexual exploitation or abuse, in accordance with articles 35 and 34 of the Convention on the Rights of the Child; 11. Calls upon all States: (a) To take all appropriate national, bilateral and multilateral measures to prevent the abduction of, the sale of, or traffic in children for any purpose or in any form, and any form of sexual exploitation or abuse of children, including within the family, or for commercial purposes, child pornography and child prostitution, and through child sex tourism, taking into account the particular problems posed by the use of the Internet in this regard, and to protect children from these practices, while ensuring that the child victims are not penalized for such practices, in accordance with the provisions of the Convention on the Rights of the Child and taking into account the concrete measures outlined in the Vienna Declaration and Programme of Action and in the Programmes of Action adopted by the Commission in 1992, 1993 and 1996; (b) And, in this regard, to enact, review and revise, where appropriate, relevant laws, policies, programmes and practices; (c) And, in this context, to consider the positive input by other international initiatives outside the United Nations system and to encourage regional and interregional efforts with the objective of identifying best practices and issues requiring particularly urgent action, such as the Declaration and Agenda for Action of the World Congress against Commercial Sexual Exploitation of Children, held in Stockholm in August 1996 (A/51/385, annex), and its follow-up, inter alia the Child Welfare Experts' Meeting of the Asia-Europe Meeting, held in London from 6 to 8 October 1998; (d) And relevant United Nations bodies and agencies to allocate appropriate resources for comprehensive and gender-sensitive programmes to rehabilitate physically and psychologically child victims of sale, trafficking, abduction and of any form of sexual exploitation and abuse, and to take all appropriate measures to promote their full recovery and social reintegration; page 8