A/RES/55/155 three new working groups, in addition to the working group on the crime of aggression, Recognizing the continuing need for making available adequate resources and secretariat services to the Preparatory Commission in order to enable it to discharge its functions efficiently and expeditiously, Emphasizing the need to make the necessary arrangements for the commencement of the functions of the International Criminal Court in order to ensure its effective operation, Noting that a growing number of States have deposited their instruments of ratification and that a significant number of States have signed the Statute, 1. Reiterates the historic significance of the adoption of the Rome Statute of the International Criminal Court;1 2. Calls upon all States to consider signing, ratifying or acceding to the Rome Statute of the International Criminal Court, as appropriate, and encourages efforts aimed at promoting awareness of the results of the United Nations Diplomatic Conference of Plenipotentiaries on the Establishment of an International Criminal Court and of the provisions of the Statute; 3. Welcomes the important work accomplished by the Preparatory Commission in the completion of the part of the mandate relating to the draft texts of the rules of procedure and evidence and the elements of crimes, as required under resolution F, 4 and notes in this respect the importance of the growing participation in the work of the working group on the crime of aggression; 4. Requests the Secretary-General to reconvene the Preparatory Commission, in accordance with resolution F, from 26 February to 9 March and from 24 September to 5 October 2001, to continue to carry out the mandate of that resolution and, in that connection, to discuss ways to enhance the effectiveness and acceptance of the Court; 5. Also requests the Secretary-General to make available to the Preparatory Commission secretariat services, including the preparation of working documents if so requested by the Commission, to enable it to perform its functions; 6. Further requests the Secretary-General to invite, as observers to the Preparatory Commission, representatives of organizations and other entities that have received a standing invitation from the General Assembly, pursuant to its relevant resolutions, 6 to participate in the capacity of observers in its sessions and work, and also to invite as observers to the Commission representatives of interested regional intergovernmental organizations and other interested international bodies, including the International Tribunal for the Former Yugoslavia and the International Tribunal for Rwanda; 7. Notes that non-governmental organizations may participate in the work of the Preparatory Commission by attending its plenary and its other open meetings, in accordance with the rules of procedure of the Commission, receiving copies of the official documents and making available their materials to delegates; 6 Resolutions 253 (III), 477 (V), 2011 (XX), 3208 (XXIX), 3237 (XXIX), 3369 (XXX), 31/3, 33/18, 35/2, 35/3, 36/4, 42/10, 43/6, 44/6, 45/6, 46/8, 47/4, 48/2, 48/3, 48/4, 48/5, 48/237, 48/265, 49/1, 49/2, 50/2, 51/1, 51/6, 51/204, 52/6, 53/5, 53/6, 53/216, 54/5, 54/10 and 54/195. 2