A/RES/53/19 Page 3 8. Decides to appropriate to the Special Account for the United Nations Mission of Observers in Tajikistan, for the maintenance of the Mission of Observers, for the period from 1 July 1998 to 30 June 1999, the amount of 11,984,880 dollars gross (11,128,880 dollars net), in addition to the initial amount of 8,015,120 dollars gross (7,587,120 dollars net) for the period from 1 July to 31 October 1998, inclusive of an amount of 415,120 dollars for the support account for peacekeeping operations for the period from 1 July 1998 to 30 June 1999, already appropriated and assessed under the terms of its resolution 52/229 B; 9. Decides also, as an ad hoc arrangement, and taking into account the amount of 8,015,120 dollars gross (7,587,120 dollars net) already apportioned under the terms of resolution 52/229 B, to apportion the additional amount of 11,984,880 dollars gross (11,128,880 dollars net) for the period from 1 November 1998 to 30 June 1999 among Member States, at a monthly rate of 1,498,110 dollars gross (1,391,110 dollars net), 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 years 1998 and 1999, as set out in its resolution 52/215 A of 22 December 1997, subject to the decision of the Security Council to extend the mandate of the Mission of Observers beyond 15 November 1998; 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 additional estimated staff assessment income of 856,000 dollars approved for the period from 1 November 1998 to 30 June 1999; 11. Invites voluntary contributions to the Mission of Observers 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; 12. Decides to keep under review during its fifty-third session the agenda item entitled "Financing of the United Nations Mission of Observers in Tajikistan". 50th plenary meeting 2 November 1998