As of the time of writing, the most recent Prohibited List is the version released in January 2008. The list is updated regularly and it would be my recommendation that you always refer to the version found on the WADA website (http://www.wada-ama.org/) in preference to any other versions or interpretations (even those that might be issued by national governing bodies). The list is relatively self-explanatory and deals with substances (drugs) and some techniques which may be employed to give an unfair advantage.