Conversely, No Fault or Negligence would not apply in the following circumstances: (a) a positive test resulting from a mislabelled or contaminated vitamin or nutritional supplement (Athletes are responsible for what they in gest (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 a re responsible for what they ing est and for the conduct of those Persons to whom they entrust access to their food and drink).