World Summit was a mandate (labelled id 17171 ) for the Secretary-General to "review all mandates older than five years originating from resolutions of the General Assembly and other organs". To facilitate this review and to finally bring coherence to the organization, the Secretariat has produced an on-line registry of mandates to draw together the reports relating to each one and create an overall picture. [ 62 ] Greening the Blue On 5 June 2007, World Environment Day , Secretary-General Ban Ki-moon made public his ambition to make the United Nations more efficient in its operations: "I would like to see our renovated Headquarters complex eventually become a globally acclaimed model of efficient use of energy and resources. Beyond New York, the initiative should include the other United Nations headquarters and offices around the globe." The UN's progress towards achieving this goal is communicated through the initiative Greening the Blue (see external links below). The UN is financed from assessed and voluntary contributions from member states. The General Assembly approves the regular budget and determines the assessment for each member. This is broadly based on the relative capacity of each country to pay, as measured by their gross national income (GNI), with adjustments for external debt and low per capita income. [ 66 ] The Assembly has established the principle that the UN should not be overly dependent on any one member to finance its operations. Thus, there is a 'ceiling' rate, setting the maximum amount any member is assessed