Public laws, 88th Congress. 156. H.R. 7544, act to amend Social security act to assist States and communities in preventing and combating mental retardation through expansion and improvement of maternal and child health and crippled children's programs, through provision of prenatal, maternity, and infant care for individuals with conditions associated with childbearing which may lead to mental retardation, and through planning for comprehensive action to combat mental retardation, and for other purposes.