A/RES/69/194 United Nations Model Strategies and Practical Measures on the Elimination of Violence against Children in the Field of Crime Prevention and Criminal Justice (e) To prohibit and effectively prevent the use of corporal punishment as a disciplinary measure, to adopt clear and transparent disciplinary policies and procedures that encourage the use of positive and educational forms of discipline and to establish in law the duty of managers and personnel of detention facilities to record, review and monitor every instance in which disciplinary measures or punishment are used; (f) To prohibit any form of violence or threats of violence against children by staff of places of detention in order to force children to engage in activities against their will; (g) To ensure the effective supervision and protection of children, as necessary, from violence by other children and adults, including through measures to prevent bullying by adults and by other children, and from self-harm; (h) To prevent violence associated with youth gang activities and racist harassment and violence within places of detention; (i) To encourage and facilitate, wherever possible and in the best interests of the child, frequent family visits and regular contact and communication between children and their family members, as well as with the outside world, and to ensure that disciplinary sanctions for detained children do not include a prohibition of contact with family members; (j) To prevent violence against and abuse of children suffering from mental illness or drug addiction, including through treatment and other measures to protect them from self-harm. 40. Recognizing the importance of preventing violence against children through appropriate staff recruitment, selection, training and supervision, Member States are urged, as appropriate: (a) To ensure that all personnel working with children in places of detention are qualified, selected on the basis of professional capacity, integrity, ability and personal suitability, sufficiently remunerated, adequately trained and effectively supervised; (b) To ensure that any person who has been convicted of a criminal offence against a child is not eligible to work in an agency or organization providing services to children, and to require agencies and organizations providing services to children to prevent persons who have been convicted of a criminal offence against a child from coming into contact with children; (c) To train all personnel and make them aware of their responsibility to identify early signs of risks of violence and mitigate that risk, to report incidents of violence against children and to actively protect children against violence in an ethical and child- and gender-sensitive manner. 41. Taking into account the distinctive needs of girls and their vulnerability to gender-based violence, Member States are urged, as appropriate and while taking into consideration relevant international human rights instruments: (a) To eliminate the risk of all forms of harassment, violence and discrimination against girls; (b) To ensure that the special needs and vulnerabilities of girls are taken into account in decision-making processes; 26/29