Nations delegated to the Administrator of UNDP the full responsibility for the administration, control and operation of the Fund, including the administration and direction of the United Nations Sudano-Sahelian Offioe (UNSO) at headquarters and in the field. UN80 acts as the primary United Nations contact with the Permanent Inter-State Committee on Drought Control in the Sahel (CILSS) and, in consultation with CILSS and the Governments concerned, selects and implements priority projects oontained in tbo CILSS prograsmm of medium-trrm and long-term recovery and rehabilitation in the drought-stricken Sahbrlian countrirs. 39. As shown in statement IX, the total income of the lurid in 1989 amounted to $32.0 million and expenditure to $18.1 million. At the end of 1989, tbe unspent allocations amounted to $26.2 million. The status of all sub-trust funds is roflocted in statement XXVII. PI xm., 1912. (S/l982/16/Rev.l), decision 82122, para. 6. up/ Ibip., 1988. No. p (t/1988/19), decision 88144, para. 1. -lO- United Nations Su&l+Sahelian Offiae .- Plan of Action to Combat Desertif- 40. The United Nations Sudano-Sahelian Office is responsible for assisting, on behalf of the United Nations Environment Progronune (UNEP), the aountrios of the Sudan+Sahelian region in the implementation of the Plan of Action to Combat Desertification. The work is aarried out as a UNDP/UNEP joint venture, with both programmes contributing equal shares of programme (operational) support and administrative (institutional) support. Details of contributions reaeived and expenditure incurred on the UNDP/UNEP joint venture are given in note 21 (b) to the finanaial statements. mted Nations Volunteers proarammg 41. This progrsrnme was established by General Assembly resolution 2659 (XXV) of 7 December 1970. As shown in statement X, the total income of the UNV programme in 1989 amounted to $0.2 million and expenditure of the trust fund to $4.0 million, 