"Cannabis could be rescheduled either legislatively, through Congress, or through the executive branch. Congress has so far rejected all bills to reschedule cannabis. However, it is not unheard of for Congress to intervene in the drug scheduling process; in February 2000, for instance, the 105th Congress, in its second official session, passed Public Law 106-172, also known as the Hillory J. Farias and Samantha Reed Date-Rape Drug Prohibition Act of 2000,[21] adding GHB to Schedule I.[22] On June 23, 2011, Rep. Barney Frank and Rep. Ron Paul introduced H.R. 2306,[23] legislation that would completely remove cannabis from the federal schedules, limiting the federal government's role to policing cross-border or interstate transfers into states where it remains illegal.
The Controlled Substances Act also provides for a rulemaking process by which the United States Attorney General can reschedule cannabis administratively. "
From the Wiki-monster
There is nothing in your link that allows the USAG any roll in the declassification of a controlled substance. And the process outlined could take years.