Public Laws, 86th Congress. 778. H.R,' 12580, act to extend and Improve coverage under Federal old-age. survivors and disability Insurance system and to remove hardships and inequities, Improve financing of trust funds, and provide disability benefits to additional individuals under such system; to provide grants to States for medical care for aged Individuals of low Income; to amend public assistance and maternal and child welfare provisions of Social security act; to improve unemployment compensation provisions of such act; and for other purposes.