for international cooperation in accordance with articles 11 (1), 22 and 23 of the Covenant, and that the Committee be informed thereof. 11. States parties must give due priority to those social groups living in unfavourable conditions by giving them particular consideration. Policies and legislation should correspondingly not be designed to benefit already advantaged social groups at the expense of others. The Committee is aware that external factors can affect the right to a continuous improvement of living conditions, and that in many States parties overall living conditions declined during the 1980s. However, as noted by the Committee in its general comment No. 2 (1990) (E/1990/23, annex III), despite externally caused problems, the obligations under the Covenant continue to apply and are perhaps even more pertinent during times of economic contraction. It would thus appear to the Committee that a general decline in living and housing conditions, directly attributable to policy and legislative decisions by States parties, and in the absence of accompanying compensatory measures, would be inconsistent with the obligations under the Covenant. 12. While the most appropriate means of achieving the full realization of the right to adequate housing will inevitably vary significantly from one State party to another, the Covenant clearly requires that each State party take whatever steps are necessary for that purpose. This will almost invariably require the adoption of a national housing strategy which, as stated in paragraph 32 of the Global Strategy for Shelter, “defines the objectives for the development of shelter conditions, identifies the resources available to meet these goals and the most cost-effective way of using them and sets out the responsibilities and time frame for the implementation of the necessary measures”. Both for reasons of relevance and effectiveness, as well as in order to ensure respect for other human rights, such a strategy should reflect extensive genuine consultation with, and participation by, all of those affected, including the homeless, the inadequately housed and their representatives. Furthermore, steps should be taken to ensure coordination between ministries and regional and local authorities in order to reconcile related policies (economics, agriculture, environment, energy, etc.) with the obligations under article 11 of the Covenant. 13. Effective monitoring of the situation with respect to housing is another obligation of immediate effect. For a State party to satisfy its obligations under article 11 (1) it must demonstrate, inter alia, that it has taken whatever steps are necessary, either alone or on the basis of international cooperation, to ascertain the full extent of homelessness and inadequate housing within its jurisdiction. In this regard, the revised general guidelines regarding the form and contents of reports adopted by the Committee (E/C.12/1991/1) emphasize the need to “provide detailed information about those groups within ... society that are vulnerable and disadvantaged with regard to housing”. They include, in particular, homeless persons and families, those inadequately housed and without ready access to basic amenities, those living in “illegal” settlements, those subject to forced evictions and low-income groups. 14. Measures designed to satisfy a State party’s obligations in respect of the right to adequate housing may reflect whatever mix of public and private sector measures considered appropriate. While in some States public financing of housing might most