A/RES/55/26 12. Urges all relevant organizations and bodies of the United Nations system, including the funds and programmes, specialized agencies and the international financial institutions, actively to participate in the preparations for the special session; 13. Reiterates its invitation to the Committee on the Rights of the Child to provide its input to the preparatory process and at the special session; 14. Reiterates its invitation also to all relevant experts, including the Special Representative of the Secretary-General for Children and Armed Conflict and the Special Rapporteur of the Commission on Human Rights on the sale of children, child prostitution and child pornography, to participate in the preparatory process and the special session, in accordance with the established practice; 15. Decides to convene the special session of the General Assembly for follow-up to the World Summit for Children from 19 to 21 September 2001, and to refer to it as the “special session on children”; 16. Decides also to convene two substantive sessions of the Preparatory Committee in New York during 2001, one from 29 January to 2 February and the other from 11 to 15 June; 17. Decides further to invite the associate members of the regional commissions listed in the footnote 6 to participate as observers in the special session and its preparatory process, subject to the rules of procedure of the General Assembly; 18. Reaffirms the importance of the full participation of the least developed countries in the special session and the preparations for the session, and in this regard expresses its appreciation to the Governments which have made financial contributions to the trust fund established by the Secretary-General for that purpose, and invites the Governments which have not yet contributed to do so; 19. Expresses its appreciation to the Governments which have made financial contributions towards the preparatory activities undertaken by the United Nations Children’s Fund as the substantive secretariat of the special session, and encourages Governments which have not yet contributed to do so; 20. Decides to include in the provisional agenda of its fifty-sixth session an item entitled “Follow-up to the outcome of the special session on children”. 69th plenary meeting 20 November 2000 6 American Samoa, Anguilla, Aruba, British Virgin Islands, Commonwealth of the Northern Mariana Islands, Cook Islands, French Polynesia, Guam, Montserrat, Netherlands Antilles, New Caledonia, Niue, Puerto Rico, United States Virgin Islands. 3