2  2.1.2   Sufficient proof of an anti -doping rule violation un der Article 2.1 is establis hed by any of the following: presence of a Prohibited  Substance  or its Metabolites  or Markers  in the Athlete’s  A Sample  where the Athlete  waives analysis of the B Sample  and the B Sample  is not analysed ; or, where the Athlete’s  B Sample  is analysed  and the  analysis of the Athlete’s  B Sample  confirms the presence of the Prohib ited Substance  or its Metabolites  or Markers  found in the Athlete’s  A Sample ; or where the Athlete’s  A or B Sample  is split into two (2) parts and the analysi s of the confirmation part of the split Sample  confirms the presence  of the  Prohibited Substance  or its  Metabolites  or Markers  found in the first part of the split Sample  or the Athlete  waives analysis of the confirmation part of the split Sample .3  2  [Comment to Article 2.1.1: An anti -doping r ule violation is committed un der this Article without regard to an Athlete’s Fault.