A/RES/55/180 31 December 2000 and the balance, that is, 38,092 dollars, pertaining to the period from 1 to 31 January 2001; 18. Decides, as an ad hoc arrangement, and taking into account the amount of 61,180,707 dollars gross (59,120,770 dollars net) already apportioned in accordance with its resolution 54/267 for the period from 1 February to 30 June 2001, to apportion among Member States the additional amount of 36,149,331 dollars gross (35,958,875 dollars net), at a monthly rate of 7,229,867 dollars gross (7,191,775 dollars net), in accordance with the scheme set out in the present resolution, taking into account the scale of assessments for the year 2001, 4 subject to the decision of the Security Council to extend the mandate of the Force beyond 31 January 2001; 19. 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 18 above, their respective share in the Tax Equalization Fund of the estimated additional staff assessment income of 190,456 dollars approved for the Force for the period from 1 February to 30 June 2001; 20. Emphasizes that no peacekeeping mission shall be financed by borrowing funds from other active peacekeeping missions; 21. 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 Force; 22. Invites voluntary contributions to the Force 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; 23. Decides to keep under review during its fifty-fifth session, under the item entitled “Financing of the United Nations peacekeeping forces in the Middle East”, the sub-item entitled “United Nations Interim Force in Lebanon”. 86th plenary meeting 19 December 2000 4