Although the buildings are owned and administered by self-governing and economically independent organizations, the State of Denmark is strongly regulating public housing in the country. By law, the municipalities have access to 25% of the rentals, usually reserving them for the poor, the unemployed, the disabled or mentally ill or any other group dependent on social benefits from the municipality. Over the years, these regulations have created many 'especially vulnerable residential areas' – so called "ghettos" – within the country. Danish public housing has never had any income restrictions, but in recent years new state regulations has made it mandatory for several of them to favor fully employed renters and disfavor unemployed or part-time employed people. This is a relatively new effort by the state to counter the ghettoisation, which is now an officially recognized problem countrywide.