The DEA recently denied a 2002 petition filed by Americans for Safe Access (ASA) to institute proceedings to determine whether marijuana should be reclassified from a federal schedule I controlled substance to a lesser classification that would permit it to be used for medical purposes. ASA Rescheduling Background. Thanks to Talk Left, here's the original petition, ASA's federal lawsuit to force the DEA to rule on the petition, and the DEA's decision, which was published in yesterday's Federal Register, in pdf and text versions. ASA say they will now appeal to the D.C. Circuit.