From the Commission's press release:
The United States Sentencing Commission unanimously voted today to give retroactive effect to a recent amendment to the Federal Sentencing Guidelines that reduces penalties for crack cocaine offenses. Retroactivity of the crack cocaine amendment will become effective on March 3, 2008.
Not every crack cocaine offender will be eligible for a lower sentence under the decision. A Federal sentencing judge will make the final determination of whether an offender is eligible for a lower sentence and how much that sentence should be lowered.
That determination will be made only after consideration of many factors, including the Commission’s direction to consider whether lowering the offender’s sentence would pose a danger to public safety. In addition, the overall impact is anticipated to occur incrementally over approximately 30 years, due to the limited nature of the guideline amendment and the fact that many crack cocaine offenders will still be required under Federal law to serve mandatory five- or ten-year sentences because of the amount of crack involved in their offense.