Co nversely, No Fault or Negligence would not apply in the following circumstances: (a) a positive test resulting from a mislabeled or contaminated vi tamin or nutritional supplement (Athletes are responsible for what they ingest (Article  2.1) and have been wa rned 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 ot her 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).