Actually the reference staff advocates a healthier diet including high fiber. However, the following is a list of documents that pertain to the U.S. Sentencing Commission and Supreme Court decisions to treat cocaine and crack possession more equally.
The press release of the U.S. Sentencing Commission dated December 11, 2007 that allows for retroactive action on crack sentences.
Kimbrough v. U.S., Docket #06-6330 (U.S. Supreme Court Decision, dated December 10, 2007)
Briefs for Kimbrough v. U.S.
Oral Arguments for Kimbrough v. U.S.
2007 Federal Sentencing Guidelines Manual, dated November 1, 2007.
Report of the U.S. Sentencing Commission to Congress dated May 2007 regarding cocaine sentencing.