2.21.6. To prevent the negative consequences of deprivation of liberty, it is necessary to review the legislation and to implement new and more flexible legal mechanisms, especially with respect to the use of alternative sentences and preventive measures. These consequences have particularly negative consequences for juveniles deprived of liberty. 2.21.7. Clear criteria need to be prescribed in legislation for the competent authority to take an effective decision for choosing a PI for execution of the sentence of the person deprived of liberty, for changing the correctional institution type, and for allocation between cells. In choosing the PI, in particular, the place where close relatives of the person deprived of liberty live shall be taken into account. The mechanism for changing the correctional institution type from a higher to a lower level of isolation should be clear and predictable for persons deprived of liberty. 2.21.8. A stable mechanism for permanent monitoring of the behavior of persons deprived of liberty and assessing their level of risk on the basis of clear criteria should be introduced in the penitentiary legislation. 2.21.9. Taking into consideration that not all persons deprived of liberty in PIs accept the criminal subculture, and some actively rebel against the informal leaders within that subculture, it is necessary to introduce a flexible system of rewards and penalties: the rewards and penalties shall be clear and predictable for persons deprived of liberty. The reward or penalty applied shall play a key role in choosing the correctional institution type (regime) for sentence execution or for promoting or restricting the decision to move the person to a lesser degree of isolation or to consider early conditional release from serving the sentence. 2.21.10. To refrain from offending and to stay uninfluenced by the criminal subculture, opportunities for staying in touch 47