28 C.F.R. § 523.33
How is eligibility for DCEGT limited?
Eligibility for DCEGT is limited in two ways:
(a) If you violate prison rules, you are not eligible for one month's worth of DCEGT for each disciplinary incident committed during the program enrollment period. A Discipline Hearing Officer, or other staff using procedures similar to those in 28 CFR 541.17, must determine that you committed a prohibited act.
(b) The nature of your offense may limit your eligibility for DCEGT under D.C. Code 24-221.01b or 24-221.06.