On the federal level, Congress abolished parole in the Comprehensive Crime Control Act of 1984 (Pub. L. No. 98-473 § 218(a)(5), 98 Stat. 1837, 2027 18 U.S.C.A. § 4201 et seq.). Federal prisoners may, however, earn a maximum of 54 days good time credit per year against their sentence (18 U.S.C.A. § 3624(b)). At the time of sentencing, the federal judge may also specify a post-imprisonment period of supervised release. The U.S. Parole Commission still has jurisdiction over parole for those prisoners convicted of felonies in the District of Columbia and who are serving their sentences there, as well as over certain federally incarcerated military and international prisoners.