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.