Each National  Federation  shall  in turn ensure  that its members,  and the constituents  of its members,  are also provided with the most recent version of the Prohibited  List.16  4.2 Prohibited Substances and Prohibited Methods Identified o n the Prohibited  List  4.2.1  Prohibited Substances and Prohibited  Methods   The Prohibited List shall identify those Prohibited Substances and Prohibited Methods which are prohibited as doping at all times (both In-Competition and Out-of-Competition ) because of their potential to enhance performance in future Competitions or their  masking potential, and those substances and methods which are prohibited In-Competition only.