Box-30 When a person is serving his/her sentence in jail, the authorities shall: Art.21of the Const. Art.21 and 23 of the Const. 1. Ensure that all convicted persons are treated with dignity within the prisons. 2. Ensure that all prisoners are provided with facilities to express their grievances faced within the jail. 3. Ensure that no person is subject to any kind of physical or mental torture, or cruel, inhuman or degrading treatment or punishment within the jails. 4. Ensure that due care is taken of health and personal safety needs of the convicts. Box-31 When a person is serving his/her sentence in jail, the authorities shall not: Art .21of the Const. 1. Isolate a prisoner in a separate cell, except on medical ground or if the prisoner has proven to be dangerous for other prisoners lodged in the prison. 2. Prevent the person from sending letters to his relatives and to other prisoners irrespective of the relationship. 49