2.5 Tampering  or Attempted Tampering  with any P art of Doping Control  by an Athlete  or Other Person  2.6 Possession  of a Prohibited Substance or a  Prohibited Method by an Athlete  or Athlete Support Person  2.6.1 Possession  by an Athlete  In-Competition of any  Prohibited Substance or any  Prohibited Method, or  Possession by an Athlete Out -of-Competition of any  4  [Comment to Article 2.2: It has always been the case that Use or Attempted Use of a Prohibited Substance or Prohibited Method may be established by any reliable means.