Conversely, 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 w hat 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 respons ible 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).