The Housing Law establishes in its articles 5, 8 sections IX, XVI, XVII and XVIII; 19, sections I, II, VII and VIII; 23, section 1, 71, 86 and 87, that public housing policies and programs, as well as housing instruments and support, must consider the different types and modalities of housing production, among others: that promoted by businesses and that self-produced or self-built, in ownership, lease or in other legitimate forms of tenure; as well as for the various housing needs: acquisition or development of land, lots with minimum services, material yards, housing improvement, housing replacement, new housing and, training, comprehensive assistance and research on housing and land, promoting that the supply of adequate housing reflects the lowest costs of land, infrastructure, services, construction, financing and titling in the respective markets, for which purpose, they will incorporate measures of information, competition, transparency and others that are convenient to achieve this purpose; as well as developing, implementing and promoting schemes, mechanisms and programs of financing, subsidy and prior savings for housing, in its different types and modalities, prioritizing attention to the population in poverty, promoting and encouraging actions that facilitate access to resources and public and private financing for the construction and improvement of housing in marginalized urban areas and in rural and indigenous towns and communities; as well as implementing programs that allow improving their living spaces and guaranteeing structural safety and climate adaptation with criteria of sustainability, energy efficiency and disaster prevention, preferably using standardized goods and services in any of their modalities.