A/RES/55/258 a national of that State in a senior post and that there is no monopoly on senior posts by nationals of any State or group of States; 2. Requests the Secretary-General to take all the necessary measures to ensure, at the senior and policy-making levels of the Secretariat, equitable representation of Member States, especially those with inadequate representation at those levels, unrepresented and under-represented, in particular developing countries, in accordance with the relevant resolutions of the General Assembly, and to continue to include relevant information thereon in all future reports on the composition of the Secretariat; 3. Reiterates its request to the Secretary-General to increase further his efforts to improve the composition of the Secretariat by ensuring a wide and equitable geographical distribution of staff in all departments; 4. Requests the Secretary-General to undertake a study, in the context of the report on the composition of the Secretariat as of 30 June 2002, on the ramifications of changing the relative weights of the population factor from the current level of 5 per cent, the membership factor (from 40 per cent) and the contribution factor (from 55 per cent); XI Administration of justice 1. Decides to inscribe the item entitled “Administration of justice” in the provisional agenda of its fifty-sixth session; 2. Notes with concern that the present system for the administration of justice at the United Nations is slow and cumbersome; 3. Welcomes the proposal of the Secretary General to establish a function of ombudsman; 4. Requests the Secretary-General to submit a report, after consultations with the staff, on the possible amendments to the staff rules and regulations to review the role of the Joint Appeals Board, taking into account the following four options: (a) The current nature of the Joint Appeals Board (JAB) as an advisory body, with the following changes: (i) Members representing the staff shall be elected solely by the staff without prejudice to the right of the Secretary-General to appoint members representing the administration; (ii) Jointly selecting the chairpersons and examining the need for a full-time chairperson; (iii) The current power of the JAB to suspend action on a contested decision; (iv) Limiting the time available for the JAB to produce its report and recommendations to three months from the date of receipt of the application; (b) The current nature of the JAB; (c) Changing the nature of the JAB from an advisory body to a semi-judicial body with the power to take decisions; (d) Other changes that might flow from these consultations; 5. Requests the Secretary-General to report to the General Assembly on an annual basis on the outcome of the work of the Joint Appeals Board; 8