"On August 3, 2010, President Obama signed the Fair Sentencing Act of 2010 into law.1 This measure eliminated the five-year mandatory minimum prison sentence that previously adhered under federal law upon a conviction for possession of five grams or more of crack cocaine.2 The Act also increased the amount, in weight, of crack that must be implicated for either a five- or a ten-year mandatory minimum sentence to apply upon conviction of any of several federal drug trafficking crimes.3"

Source

Graham, Kyle, "Sorry seems to be the hardest word: The Fair Sentencing Act of 2010, Crack, and Methamphetamine, "University of Richmond Law Review (Richmond, VA: Richmond School of Law, March 2011) Vol. 45, Issue 3, p. 765.
http://lawreview.richmond.edu…