In April 2009, Los Angeles enacted Ordinance 180636, known as the Green Building Retrofit Ordinance. This ordinance was later amended by Ordinance 182259. The law requires all city-owned buildings that are either more than 7,500 square feet or built before 1978 to be retrofitted. The goal of the retrofits will be to achieve LEED for Existing Buildings Silver certification or higher. This requirement is subject to the availability of state or federal funds. The Ordinance requires that at least half of the buildings retrofitted are located in high-poverty and high-unemployment areas, and that, to the extent feasible, all construction be performed by local residents.