(a) The purpose of this subpart is to describe procedures for the earning and application of Time Credits as authorized by 18 U.S.C. 3632(d)(4) and Section 101 of the First Step Act of 2018 ( Pub. L. 115-391 , December 21, 2018, 132 Stat. 5194) (FSA), hereinafter referred to as "FSA Time Credits" or "Time Credits."(b) Generally, as defined and described in this subpart, an eligible inmate who successfully participates in Evidence-Based Recidivism Reduction (EBRR) Programs or Productive Activities (PAs) that are recommended based on the inmate's risk and needs assessment may earn FSA Time Credits to be applied toward prerelease custody or early transfer to supervised release under 18 U.S.C. 3624(g) .