Each Member Association  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 .17  4.2  Prohibited Substances  and Prohibited Methods  Identified on 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 enhan ce performance in future Competitions or their masking potential, and those substances and methods which are prohibited In-Competition only.