A/RES/52/228 Page 3 period from 1 July 1997 to 30 June 1998, inclusive of the amount of 9,300,500 dollars gross (8,478,100 dollars net) already authorized, with the concurrence of the Advisory Committee, for the period from 1 November 1997 to 31 March 1998 under the terms of General Assembly resolution 49/233 A of 23 December 1994 and in addition to the amount of 30,229,800 dollars gross (28,430,400 dollars net) already appropriated for the period from 1 July 1997 to 30 June 1998 under the provisions of Assembly resolution 51/2 B; 9. Decides also, as an ad hoc arrangement, to apportion the additional amount of 11,077,300 dollars gross (10,309,500 dollars net) for the period ending 20 April 1998 among Member States, taking into account the amount of 24,351,780 dollars gross (22,902,270 dollars net) already assessed for the same period under the terms of General Assembly resolution 51/2 B, in accordance with the composition of groups set out in paragraphs 3 and 4 of 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 1997, as set out in its resolution 49/19 B of 23 December 1994 and its decision 50/471 A of 23 December 1995, and the scale of assessments for the year 1998, 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 additional estimated staff assessment income of 767,800 dollars approved for the period ending 20 April 1998, taking into account the amount of 1,449,510 dollars already approved for the same period; 11. Decides, as an ad hoc arrangement, to apportion the amount of 6,095,000 dollars gross (5,679,800 dollars net) for the period from 21 April to 30 June 1998 among Member States at the monthly rates indicated in the annex to the present resolution, in accordance with the scheme set out in the present resolution and the scale of assessments for the year 1998, and subject to the decision of the Security Council to extend the mandate of the Mission beyond 20 April 1998; 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 415,200 dollars approved for the period from 21 April to 30 June 1998; 13. 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; 14. Decides to keep under review during its fifty-second session the item entitled "Financing of the United Nations Mission for the Referendum in Western Sahara". 82nd plenary meeting 31 March 1998 /...