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 Prohibited 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 Substa nce of Abuse  is final and shall not be subject to any challenge by a Rider  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 perfo rmance, represent a health risk or violate the spirit of sport.