A/HRC/5/21 page 8 17. Both the State’s written presentation and the summaries prepared by the Office of the High Commissioner for Human Rights shall be ready six weeks prior to the review by the working group to ensure the distribution of documents simultaneously in the six official languages of the United Nations, in accordance with General Assembly resolution 53/208 of 14 January 1999. 2. Modalities 18. The modalities of the review shall be as follows: (a) The review will be conducted in one working group, chaired by the President of the Council and composed of the 47 member States of the Council. Each member State will decide on the composition of its delegation;2 (b) dialogue; (c) Observer States may participate in the review, including in the interactive Other relevant stakeholders may attend the review in the working group; (d) A group of three rapporteurs, selected by the drawing of lots among the members of the Council and from different Regional Groups (troika) will be formed to facilitate each review, including the preparation of the report of the working group. The Office of the High Commissioner for Human Rights will provide the necessary assistance and expertise to the rapporteurs. 19. The country concerned may request that one of the rapporteurs be from its own Regional Group and may also request the substitution of a rapporteur on only one occasion. 20. A rapporteur may request to be excused from participation in a specific review process. 21. Interactive dialogue between the country under review and the Council will take place in the working group. The rapporteurs may collate issues or questions to be transmitted to the State under review to facilitate its preparation and focus the interactive dialogue, while guaranteeing fairness and transparency. 22. The duration of the review will be three hours for each country in the working group. Additional time of up to one hour will be allocated for the consideration of the outcome by the plenary of the Council. 2 A Universal Periodic Review Voluntary Trust Fund should be established to facilitate the participation of developing countries, particularly the Least Developed Countries, in the universal periodic review mechanism.