A/RES/53/211 Page 3 10. Also requests the Secretary-General to ensure that every official of the United Nations is responsible to the Secretary-General for the regularity of the actions taken by him or her in the course of his or her official duties and that any official who takes any action contrary to the financial rules, or to the administrative instructions issued in connection therewith, may be held personally responsible and financially liable for the consequences of such action; 11. Recalls its request to the Secretary-General in its resolution 49/218 of 23 December 1994 to include full implementation of the Financial Regulations and Rules of the United Nations as a specific performance indicator in the performance appraisal of all managers; 12. Decides to appropriate to the Special Account for the United Nations Observer Mission in Angola the additional amount of 87.2 million dollars gross (84,575,000 dollars net) for the operation of the Observer Mission for the period from 1 July 1998 to 30 June 1999, taking into account the amount of 45,899,080 dollars gross (44,301,680 dollars net) already appropriated for the period from 1 July to 31 October 1998 under the provisions of its resolution 52/8 C, and inclusive of the amount of 10.9 million dollars gross (10,500,650 dollars net) authorized by the Advisory Committee for the month of November 1998 under the terms of section IV of General Assembly resolution 49/233 A of 23 December 1994; 13. Decides also, as an ad hoc arrangement, and taking into account the amount of 45,899,080 dollars gross (44,301,680 dollars net) already apportioned under the provisions of its resolution 52/8 C, to apportion the additional amount of 42,821,400 dollars gross (41,532,400 dollars net) for the period from 1 November 1998 to 26 February 1999 among Member States, in accordance with the composition of groups set out in paragraphs 3 and 4 of its resolution 43/232 of 1 March 1989, as adjusted by the General 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; 14. 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 13 above, their respective share in the Tax Equalization Fund of the estimated staff assessment income of 1,289,000 dollars approved for the period from 1 November 1998 to 26 February 1999; 15. Decides, as an ad hoc arrangement, to apportion among Member States the amount of 44,378,600 dollars gross (43,042,600 dollars net) for the period from 27 February to 30 June 1999 at a monthly rate of 10.9 million dollars gross (10,571,875 dollars net), in accordance with the scheme set out in the present resolution and taking into account the scale of assessments for the year 1999 as set out in its resolution 52/215 A, subject to the decision of the Security Council to extend the mandate of the Observer Mission beyond 26 February 1999; 16. 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 15 above, their respective share in the Tax Equalization Fund of the estimated staff assessment income of 1,336,000l dollars approved for the period from 27 February to 30 June 1999; 17. Invites voluntary contributions to the Observer 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; /...