A/RES/48/239 Page 4 18. Decides that there shall be set off against the apportionment among Member States, as provided for in paragraph 16 above, their respective share in the unencumbered balance of 56,027,000 dollars gross (53,018,000 dollars net) for the period from 1 May to 31 October 1993; 19. Requests the Secretary-General, in view of the amounts of the unencumbered balances which arise in some peace-keeping operations, to study the feasibility of a possible retention of the shares of Member States in the unencumbered balances of peace-keeping operations until the Member States meet all outstanding obligations in respect of the period concerned, and to report to the General Assembly in the context of agenda item 138, no later than 31 May 1994; 20. Authorizes the Secretary-General to enter into commitments for the Operation in Somalia II at a rate not to exceed 77,442,517 dollars gross (76,332,417 dollars net) per month for a period of four months beginning 1 June 1994 and, subject to the Security Council deciding to extend the mandate of the Operation beyond 31 May 1994, the amount of 154,885,034 dollars gross (152,664,834 dollars net) to be apportioned among Member States in accordance with the scheme set out in the present resolution; 21. Requests the Secretary-General to submit budget proposals, including revised estimates for the period the Security Council might decide to continue the mandate of the Operation in Somalia II beyond 31 May 1994, no later than 15 July 1994; 22. cash and in General, to established 21 December Invites voluntary contributions to the Operation in Somalia II in the form of services and supplies acceptable to the Secretarybe administered, as appropriate, in accordance with the procedure by the General Assembly in its resolutions 43/230 of 1988, 44/192 A of 21 December 1989 and 45/258 of 3 May 1991; 23. Requests the Secretary-General to take all necessary action to ensure that all United Nations activities related to the Operation in Somalia II are administered under the authority of his Special Representative in a coordinated fashion with a maximum of efficiency and economy and in accordance with the relevant mandate, and to include information on the arrangements made in this regard in his report on the financing of the Operation; 24. Decides to include in the provisional agenda of its forty-ninth session the item entitled "Financing of the United Nations Operation in Somalia II". 91st plenary meeting 24 March 1994