Requests the Secretary-General, in the light of the experience gained during the first biennial review and appraisal, to submit a report to the Economic and Social Council, together with his recommendations on the need for improvement of the present machinery for sectoral, regional and over-all review and appraisal, including its statistical base, in particular with respect to the co-ordinated contribution of the organizations and agencies of the United Nations system, so as to assist the Council in the review of its machinery as called for in resolution 1621 C (LI) of 30 July 1971;