; (5) reassess and update the recidivism risk level and programmatic needs of each prisoner pursuant to the schedule set forth in subsection (c)(2), and assess changes in the prisoner’s recidivism risk within a particular risk level; and (6) provide information on best practices concerning the tailoring of recidivism reduction programs to the specific criminogenic needs of each prisoner so as to effectively lower the prisoner’s risk of recidivating. (b) Development of system (1) In general In designing the Assessment System, the Attorney General shall— (A) use available research and best practices in the field and consult with academic and other criminal justice experts as appropriate; (B) ensure that the Assessment System measures indicators of progress and improvement, and of regression, including newly acquired skills, attitude, and behavior changes over time, through meaningful consideration of dynamic risk factors, such that— (i) all prisoners at each risk level other than low risk have a meaningful opportunity to progress to a lower risk classification during the period of the incarceration of the prisoner through changes in dynamic risk factors; and (ii) all prisoners on prerelease custody, other than prisoners classified as low risk, have a meaningful opportunity to progress to a lower risk classification during such custody through changes in dynamic risk factors; (C) ensure that the Assessment System is adjusted on a regular basis, but not less frequently than every 3 years, to take account of the best statistical evidence of effectiveness in reducing recidivism rates; and (D) ensure that the Assessment System does not result in unwarranted disparities, including by— (i) regularly evaluating rates of recidivism among similarly classified prisoners to identify any unwarranted disparities in such rates, including disparities among similarly classified prisoners of different racial groups