; (B) the prisoner’s security designation; and (C) the recommendation from the warden of the prison at which the prisoner is incarcerated at the time of making the request. (3) Additional policies The Director of the Bureau of Prisons shall develop additional policies to provide appropriate incentives for successful participation and completion of evidence-based recidivism reduction programming. Such incentives shall include not less than two of the following: (A) Increased commissary spending limits and product offerings. (B) Extended opportunities to access the email system. (C) Consideration of transfer to preferred housing units (including transfer to different prison facilities). (D) Other incentives solicited from prisoners and determined appropriate by the Director. (4) Time credits (A) In general A prisoner, except for an ineligible prisoner under subparagraph (D), who successfully completes evidence-based recidivism reduction programming or productive activities, shall earn time credits as follows: (i) A prisoner shall earn 10 days of time credits for every 30 days of successful participation in evidence-based recidivism reduction programming or productive activities. (ii) A prisoner determined by the Bureau of Prisons to be at a minimum or low risk for recidivating, who, over two consecutive assessments, has not increased their risk of recidivism, shall earn an additional 5 days of time credits for every 30 days of successful participation in evidence-based recidivism reduction programming or productive activities. (B) Availability A prisoner may not earn time credits under this paragraph for an evidence-based recidivism reduction program that the prisoner successfully completed— (i) prior to the date of the enactment of this Act; (ii) during official detention prior to the date that the prisoner’s sentence commences under section 3585(a)