; (6) determine when to provide incentives and rewards for successful participation in evidence-based recidivism reduction programs or productive activities in accordance with subsection (e); and (7) determine when a prisoner is ready to transfer into prerelease custody or supervised release in accordance with section 3624. In carrying out this subsection, the Attorney General may use existing risk and needs assessment tools, as appropriate. (b) Assignment of evidence-based recidivism reduction programs The System shall provide guidance on the type, amount, and intensity of evidence-based recidivism reduction programming and productive activities that shall be assigned for each prisoner, including— (1) programs in which the Bureau of Prisons shall assign the prisoner to participate, according to the prisoner’s specific criminogenic needs; and (2) information on the best ways that the Bureau of Prisons can tailor the programs to the specific criminogenic needs of each prisoner so as to most effectively lower each prisoner’s risk of recidivism. (c) Housing and assignment decisions The System shall provide guidance on program grouping and housing assignment determinations and, after accounting for the safety of each prisoner and other individuals at the prison, provide that prisoners with a similar risk level be grouped together in housing and assignment decisions to the extent practicable. (d) Evidence-Based recidivism reduction program incentives and productive activities rewards The System shall provide incentives and rewards for prisoners to participate in and complete evidence-based recidivism reduction programs as follows: (1) Phone and visitation privileges A prisoner who is successfully participating in an evidence-based recidivism reduction program shall receive— (A) phone privileges, or, if available, video conferencing privileges, for up to 30 minutes per day, and up to 510 minutes per month