(e) To criminalize effectively and to ensure the prosecution of offenders, whether local or foreign, by the competent national authorities, either in the offender's country of origin or in the destination country, in accordance with due process of law; (f) To increase cooperation and concerted action, at the national and international levels, by all relevant authorities and institutions, especially the law enforcement authorities, to combat effectively the existence of a market that encourages such criminal practices against children and to dismantle national and international networks trafficking in children, and encourages all actors of civil society and the media to cooperate in efforts to eradicate this phenomenon; (g) To cooperate closely with and assist the Special Rapporteur on the sale of children, child prostitution and child pornography and to furnish all information requested, including by inviting her to visit their countries; 12. Encourages Governments to consult and facilitate the active participation of children who have been victims of sexual exploitation or abuse in the development and implementation of strategies to protect children from all forms of sexual exploitation and abuse; 13. Decides: (a) To request the Secretary-General to provide the Special Rapporteur with all necessary human and financial assistance, to urge all relevant parts of the United Nations system to cooperate closely with the Special Rapporteur in order to make the full discharge of her mandate possible and to enable her to submit an interim report to the General Assembly at its fifty-fourth session and a report to the Commission at its fifty-sixth session; (b) With regard to the question of a draft optional protocol to the Convention on the Rights of the Child on the sale of children, child prostitution and child pornography: (i) To invite the Chairperson of the Working Group to conduct broad informal consultations, with the aim of promoting an early agreement on the optional protocol, and, if possible, to produce a report thereon by the end of 1999, including recommendations on how to finalize the formal negotiations; (ii) To request the Working Group to meet early in 2000 in order to make further progress with the aim of finalizing its work before the tenth anniversary of the entry into force of the Convention, and to report to the Commission at its fifty-sixth session; page 9