Conversely,  No Fault or Negligence  would  not apply  in the following  circumstances:  (a) a positive  test resulting  from  a mislabeled  or contaminated  vitamin or  nutritional  supplement  (Athletes  are responsible  for what  they ingest  (Article 2.1)  and have  been  warned  against the possibility of supplement contamination); (b) the Administration of a Prohibited Substance by the Athlete’s personal physician or trainer without  disclosure  to the Athlete  (Athletes  are responsible  for their  choice  of medical  personnel  and for advising medical  personnel that they cannot be given any Prohibited Substance); and (c) sabotage of the Athlete’s food or drink by a spouse, coach or other Person  within  the Athlete’s  circle  of associates  (Athletes  are responsible  for what  they ingest  and for the conduct  of those  Persons to whom they entrust access to their food and drink).