CRC/C/15/Add.201 page 15 (d) Make every effort to ensure that those children above 15 who do work legally continue to have access to education; (e) Ratify ILO Convention No. 138 concerning the Minimum Age for Admission to Employment. Sexual exploitation and trafficking 60. The Committee welcomes: (a) The establishment in spring of 2002 of a trilateral Czech-German-Polish working group to address, inter alia, trafficking in human beings, in particular the sexual exploitation of children for prostitution occurring in these areas; (b) The information contained in the State party’s report (paras. 334 and 335) on social, preventive and re-socialization programmes for victims of sexual exploitation, as well as the adoption in July 2000 of the National Plan to Fight Commercial Sexual Abuse of Children and amendments to the Criminal Code and Code of Criminal Procedure made in 2002; (c) 61. The significant work done by NGOs in this field. The Committee remains concerned at: (a) Reports of increased instances of sexual abuse of children and the low rate of reporting such crimes; (b) The lack of a comprehensive system of protection and assistance by qualified professionals to all child victims of sexual abuse and of commercial sexual exploitation; (c) The lack of follow-up to the recommendations from the 1997 visit of the Special Rapporteur on the sale of children, child prostitution and child pornography; (d) The lengthy duration of investigations into child trafficking; (e) The failure to date to ratify the Optional Protocol to the Convention on the Rights of the Child on the sale of children, child prostitution and child pornography. 62. The Committee recommends that the State party: (a) Increase protection provided to victims of sexual exploitation and trafficking, including prevention, social reintegration, access to health care and psychological assistance in a coordinated manner, including by enhancing cooperation with NGOs; (b) Ensure that a confidential, accessible and child-sensitive mechanism is established to receive and effectively address individual complaints of all children, including those in the 15 to 18-year age group;