Conversely, No Fault or Negligence would not apply in the following circ umstances:  (a) a positive test resulti ng from a mislabelled 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 Ad ministration 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 Prohibi ted Substance); and  (c) sabotage of th e 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).