A/RES/51/237 Page 3 23 December 1995, and for the year 1998,4 subject to the decision of the Security Council to extend the mandate of the Mission of Observers beyond 15 June 1997; 8. Decides also 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 7 above, their respective share in the Tax Equalization Fund of the estimated staff assessment income of 554,400 dollars approved for the period from 1 July 1997 to 30 June 1998; 9. Decides further that, for Member States that have fulfilled their financial obligations to the Mission of Observers, there shall be set off against the apportionment, as provided for in paragraph 7 above, their respective share in the unencumbered balance of 1,548,000 dollars gross (1,402,800 dollars net) in respect of the period from 17 June to 15 December 1995; 10. Decides that, for Member States that have not fulfilled their financial obligations to the Mission of Observers, their share of the unencumbered balance of 1,548,000 dollars gross (1,402,800 dollars net) for the period from 17 June to 15 December 1995 shall be set off against their outstanding obligations; 11. Decides also that, for Member States that have fulfilled their financial obligations to the Mission of Observers, there shall be set off against the apportionment, as provided for in paragraph 7 above, their respective share in the unencumbered balance of 1,312,200 dollars gross (1,260,800 dollars net) in respect of the period from 16 December 1995 to 30 June 1996; 12. Decides further that, for Member States that have not fulfilled their financial obligations to the Mission of Observers, their share of the unencumbered balance of 1,312,200 dollars gross (1,260,800 dollars net) for the period from 16 December 1995 to 30 June 1996 shall be set off against their outstanding obligations; 13. Invites voluntary contributions to the Mission of Observers in cash and in the form of services and supplies acceptable to the SecretaryGeneral, to be administered, as appropriate, in accordance with the procedure and practices established by the General Assembly; 14. Invites Member States to make voluntary contributions to the trust fund established in accordance with paragraph 13 of Security Council resolution 968 (1994); 15. Decides to include in the provisional agenda of its fifty-second session the item entitled "Financing of the United Nations Mission of Observers in Tajikistan". 101st plenary meeting 13 June 1997 4 To be adopted by the General Assembly.