The New York State Urban Development Corporation (UDC) operated New York City’s Welfare Island, as Roosevelt Island was previously known, prior to RIOC. Development of the island was based on the principles of urban "new communities" under President Lyndon Johnson’s "Great Society" programs of the 1960s and early 1970s, and development of the "new" community there was authorized by the 99-year ground lease and accompanying General Development Plan (GDP) agreed upon by New York City and New York State in 1969. The NY State GDP, which has been amended from time to time, provides for the development of housing, shops and community facilities for a mixed-income, handicap-accessible residential neighborhood.