A/RES/55/227 International Humanitarian Law Committed in the Territory of the Former Yugoslavia since 1991 and the Mission; 12. Also requests the Secretary-General to include in future budget submissions information on the guidelines applied to determine the financing through assessed contributions and other sources of income; 13. Further requests the Secretary-General to take all necessary action to ensure that the Mission is administered with a maximum of efficiency and economy; 14. Requests the Secretary-General, in order to reduce the cost of employing General Service staff, to continue efforts to recruit local staff for the Mission against General Service posts, commensurate with the requirements of the Mission; 15. Decides to appropriate the amount of 450 million dollars gross (422,053,500 dollars net) for the maintenance of the Mission for the period from 1 July 2000 to 30 June 2001, inclusive of the amount of 220 million dollars gross (207,407,400 dollars net) authorized by the General Assembly in its resolution 54/245 B; 16. Decides also, as an ad hoc arrangement, and taking into account the amount of 220 million dollars gross (207,407,400 dollars net) already apportioned in accordance with its resolution 54/245 B for the period from 1 July to 31 December 2000, to apportion the additional amount of 230 million dollars gross (214,646,100 dollars net) for the period from 1 January to 30 June 2001 among Member States 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, 52/230 of 31 March 1998 and 55/236 of 23 December 2000 and its decisions 48/472 A of 23 December 1993, 50/451 B of 23 December 1995 and 54/456 to 54/458 of 23 December 1999, and taking into account the scale of assessments for the year 2001, as set out in its resolution 55/5 B of 23 December 2000; 17. 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 16 above, their respective share in the Tax Equalization Fund of the estimated additional staff assessment income of 15,353,900 dollars approved for the Mission for the period from 1 January to 30 June 2001; 18. Emphasizes that no peacekeeping mission shall be financed by borrowing funds from other active peacekeeping missions; 19. Encourages the Secretary-General to continue to take additional measures to ensure the safety and security of all personnel under the auspices of the United Nations participating in the Mission; 20. 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; 3