A/RES/71/177 Rights of the child different forms of violence at different ages and in different situations, including in schools; 20. Also reaffirms that violence against children is never justifiable and that it is the duty of States to protect children, including those in conflict with the law, from all forms of violence and human rights violations and to exercise due diligence to prohibit, prevent and investigate acts of violence against children, eliminate impunity and provide assistance to the victims, including preventing revictimization; 21. Recalls that 2016 marks the tenth anniversary of the submission of the United Nations study on violence against children to the General Assembly, 38 and welcomes the efforts of the Special Representative of the Secretary -General on Violence against Children in mainstreaming the study recommendations in the international, regional and national agenda; 22. Expresses support for the work of the Special Representative of the Secretary-General on Violence against Children, and recognizes the progress achieved since the establishment of her mandate in promoting the prevention and elimination of all forms of violence against children in all regions and in advancing the implementation of the recommendations of the United Nations study on violence against children, including through her regional and thematic consultations and field missions and thematic reports addressing emerging concerns; 23. Urges all States, requests United Nations entities and agencies and invites regional organizations and civil society, including non -governmental organizations, to cooperate with the Special Representative of the Secretary -General on Violence against Children in promoting the further implementation of the recommendations of the United Nations study on violence against children, encourages States to provide support to the Special Representative, including adequate voluntary financial support for the continued, effective and independent performance of her mandate, and invites organizations, including the private sector, to provide voluntary contributions for that purpose; 24. Strongly condemns the abduction of children, and calls upon all State s to take all appropriate measures to secure their unconditional release, rehabilitation and reintegration and their reunification with their families or legal guardians, in accordance with the best interests of the child; 25. Notes with appreciation the adoption of the United Nations Model Strategies and Practical Measures on the Elimination of Violence against Children in the Field of Crime Prevention and Criminal Justice, 39 encourages States to take effective measures for their dissemination and impleme ntation, as appropriate, and invites relevant United Nations actors to support Member States, where appropriate, to this end through concerted efforts; Promoting and protecting the rights of children, including children in particularly difficult situations 26. Reaffirms paragraphs 40 to 48 of its resolution 68/147, and calls upon all States to promote and protect all human rights of all children, to implement evidence-based programmes and measures that provide them with special protection and assistance, including access to health care and inclusive and equitable quality _______________ 38 39 8/19 See A/61/299. Resolution 69/194, annex.