A/RES/53/18 B Page 3 account for peacekeeping operations and the amount of 508,530 dollars for the United Nations Logistics Base at Brindisi, Italy; 9. Decides also, as an ad hoc arrangement, to apportion among Member States the amount of 10,714,566 dollars gross (9,902,291 dollars net) for the period from 1 July to 14 September 1999, in accordance with the composition of groups set out in paragraphs 3 and 4 of General Assembly resolution 43/232 of 1 March 1989, as adjusted by the Assembly in its resolutions 44/192 B of 21 December 1989, 45/269 of 27 August 1991, 46/198 A of 20 December 1991, 47/218 A of 23 December 1992, 49/249 A of 20 July 1995, 49/249 B of 14 September 1995, 50/224 of 11 April 1996, 51/218 A to C of 18 December 1996 and 52/230 of 31 March 1998 and its decisions 48/472 A of 23 December 1993 and 50/451 B of 23 December 1995, and taking into account the scale of assessments for the year 1999, as set out in its resolution 52/215 A of 22 December 1997; 10. Decides further that, in accordance with the provisions of its resolution 973 (X) of 15 December 1955, there shall be set off against the apportionment among Member States, as provided for in paragraph 9 above, their respective share in the Tax Equalization Fund of the estimated staff assessment income of 812,275 dollars approved for the period from 1 July to 14 September 1999; 11. Decides, as an ad hoc arrangement, to apportion among Member States the amount of 41,410,345 dollars gross (38,271,020 dollars net) for the period from 15 September 1999 to 30 June 2000, at a monthly rate of 4,343,743 dollars gross (4,014,443 dollars net), in accordance with the scheme set out in the present resolution and the scale of assessments for the years 1999 and 2000, as set out in its resolution 52/215 A, and subject to the decision of the Security Council to extend the mandate of the Mission beyond 14 September 1999; 12. Decides also that, in accordance with the provisions of its resolution 973 (X), there shall be set off against the apportionment among Member States, as provided for in paragraph 11 above, their respective share in the Tax Equalization Fund of the estimated staff assessment income of 3,139,325 dollars approved for the period from 15 September 1999 to 30 June 2000; 13. Decides further that, for Member States that have fulfilled their financial obligations to the Mission, there shall be set off against their apportionment, as provided for in paragraph 9 above, their respective share of the unencumbered balance of 6,523,200 dollars gross (5,357,200 dollars net) in respect of the period from 1 July 1997 to 30 June 1998; 14. Decides that, for Member States that have not fulfilled their financial obligations to the Mission, their share of the unencumbered balance of 6,523,200 dollars gross (5,357,200 dollars net) in respect of the period from 1 July 1997 to 30 June 1998 shall be set off against their outstanding obligations; 15. Invites voluntary contributions to the Mission in cash and in the form of services and supplies acceptable to the Secretary-General, to be administered, as appropriate, in accordance with the procedure and practices established by the General Assembly; 16. Decides to include in the provisional agenda of its fifty-fourth session the agenda item entitled “Financing of the United Nations Mission for the Referendum in Western Sahara”. 101st plenary meeting 8 June 1999

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