A/RES/51/213 Page 3 8. Decides to appropriate the amount of 137,978,400 dollars gross (134,980,800 dollars net) for the maintenance of the Verification Mission for the period from 1 July 1996 to 30 June 1997, inclusive of the amount of 4,048,400 dollars for the support account for peacekeeping operations, in addition to the amount of 170,118,500 dollars gross (166,984,100 dollars net) already appropriated for the period from 1 July to 31 December 1996 under the provisions of General Assembly resolution 50/209 B; 9. Decides also, as an ad hoc arrangement, to apportion the amount of 137,978,400 dollars gross (134,980,800 dollars net) for the period from 1 July 1996 to 30 June 1997 among Member States at a monthly rate of 22,996,400 dollars gross (22,496,800 dollars net) beginning 1 January 1997, 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 and 50/224 of 11 April 1996 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, subject to the decision of the Security Council to extend the mandate of the Verification Mission beyond 28 February 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 2,997,600 dollars approved for the period from 1 July 1996 to 30 June 1997; 11. Decides that, for Member States that have fulfilled their financial obligations to the Verification Mission, there shall be set off against their apportionment, as provided for in paragraph 9 above, their respective share in the unencumbered balance of 20,790,900 dollars gross (20,639,700 dollars net) for the period from 9 February to 31 December 1995; 12. Decides also that, for Member States that have not fulfilled their financial obligations to the Verification Mission, their share of the unencumbered balance of 20,790,900 dollars gross (20,639,700 dollars net) for the period from 9 February to 31 December 1995 shall be set off against their outstanding obligations; 13. Invites voluntary contributions to the Verification Mission in cash and in the form of services and supplies acceptable to the SecretaryGeneral, to be administered, as appropriate, in accordance with the procedure established by the General Assembly in its resolutions 43/230 of 21 December 1988, 44/192 A of 21 December 1989 and 45/258 of 3 May 1991; 14. Decides to keep under review during its fifty-first session the agenda item entitled "Financing of the United Nations Angola Verification Mission". 89th plenary meeting 18 December 1996