4.3  WADA’s  Determination of the Prohibited List  WADA’s  determination of the Prohibited Substances  and Prohibited Methods  that will be included on the  Prohibited List , the classification of substances into categories on the Prohibit ed List , the classification of a substance as prohibited at all times or In-Competition  only, the classification of a substance or method as a Specified Substance , Specified Method  or Substance of Abuse  is final and shall not be subject to any challenge by an Athlete  or other Person  including, but not limited to, any challenge based on an argument that the substance or method was not a masking agent or did not have the potential to enhance performance, represent a health risk or violate the spirit of sport.