The Legal Services Authorities Act, 1987, mandates the provision of free legal aid to specific vulnerable sections of society to ensure access to justice. This includes persons with disabilities, mentally ill persons, members of Scheduled Castes and Scheduled Tribes, women and children, and individuals who meet certain economic criteria, such as those with an annual income below a prescribed limit. These provisions aim to uphold the constitutional guarantee of equal justice and safeguard the rights of marginalized groups.