; (B) begin to expand the effective recidivism reduction programs and productive activities it offers and add any new recidivism reduction programs and productive activities necessary to effectively implement the System, and in accordance with the recommendations made by the Attorney General under section 103 of that Act and with paragraph (2); and (C) begin to implement the other risk and needs assessment tools necessary to effectively implement the System over time, as prisoners are participating in and completing the effective recidivism reduction programs and productive activities, and in accordance with section 102 of that Act. (2) Phase-in In order to carry out paragraph (1), so that every prisoner has the opportunity to participate in and complete the kind and amount of recidivism reduction programming or productive activities they need, and be reassessed for recidivism risk as necessary to effectively implement the System and that the Attorney General recommends, the Bureau of Prisons shall, subject to the availability of appropriations— (A) provide such recidivism reduction programs and productive activities— (i) for not less than 20 percent of prisoners before the date that is one year after the date on which the Bureau of Prisons completes the risk and needs assessments under paragraph (1)(A); (ii) for not less than 40 percent of prisoners before the date that is 2 years after the date on which the Bureau of Prisons completes the risk and needs assessments under paragraph (1)(A); (iii) for not less than 60 percent of prisoners before the date that is 3 years after the date on which the Bureau of Prisons completes the risk and needs assessments under paragraph (1)(A); (iv) for not less than 80 percent of prisoners before the date that is 4 years after the date on which the Bureau of Prisons completes the risk and needs assessments under paragraph (1)(A)