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 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 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.