“Attorney General Eric Holder told the governors of Colorado and Washington Thursday that the Justice Department would not — at least for now — block their states from implementing regimes to tax, regulate, and sell marijuana. The memo listed a number of activities that could draw federal prosecutorial attention or result in a Justice Department reassessment, including sales to minors, profits going to criminal actors, diversion to pot prohibition states, marijuana sales as a cover for other drug sales, violence and the use of firearms, drugged driving and other ‘adverse public health consequences,’ and growing marijuana on public lands. That leaves some wiggle room for federal prosecutors.”
http://stopthedrugwar.org/chronicle/2013/aug/29/administration_gives_states_okay