2  2.1.2  Sufficient proof of an anti-doping rule violation under Article 2.1 is established by any of the following: presence of a Prohibited  Substance  or its Metabolites  or Markers in the Rower’s A Sample where the Rower waives analysis of the B Sample and the B Sample is not analysed; or, where the Rower’s B Sample is analysed and the analysis of the Rower’s B Sample confirms the presence of the Prohibited Substance  or its Metabolites  or Markers found in the Rower’s A Sample; or where the Rower’s A or B Sample is split into two (2) parts and the analysis 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 Rower waives analysis of the confirmation part of the split Sample.3  2.1.3  Excepting those substances for which a Decision Limit  is specifically identified in the Prohibited List  or a Technical Document , the presence of any reported quantity of a Prohibited Substance  or its Metabolites  or Markers in a Rower’s Sample shall constitute an anti-doping rule violation.