The right to housing (occasionally right to shelter) is the economic, social and cultural right to adequate housing and shelter. It is recognized in some national constitutions and in the Universal Declaration of Human Rights and International Covenant on Economic, Social and Cultural Rights. The right to housing is regarded as a freestanding right in the International human rights law which was clearly in the 1991 General Comment on Adequate Housing by the UN Committee on Economic, Social and Cultural Rights. The aspect of the right to housing under ICESCR include: availability of services, infrastructure, material and facilities; legal security of tenure; habitability; accessibility; affordability; location and cultural adequacy.