The main purpose of this legislation is to improve healthcare access for individuals who are in custody but not yet convicted of a crime. It aims to remove the existing exclusion that prevents these individuals from receiving Medicaid benefits while they are awaiting trial. The goal is to ensure that they continue to receive necessary medical care during this period, which is crucial for their health and well-being. Key provisions of the legislation include the amendment of the Social Security Act to allow Medicaid coverage for individuals in custody pending the resolution of their charges.