Preventive Detention :

Preventive detention means detention of a person without trial. The object of preventive detention is not to punish a person for having done something but to prevent him from doing it. No offence is proved nor any charge formulated and yet a person is detained because he is likely to commit an act prohibited by law. Parliament has the power to make a law for preventive detention for reasons connected with defence, foreign affairs or the security of India. Parliament and State Legislatures are both entitled to pass a law of preventive detention for reasons connected with the security of State, the maintenance of public order, or the maintenance of supplies and services essential to the community.