ITTF  2021 Anti -Doping Rules  Page 7 of 61  2.5  Tampering  or Attempted Tampering  with any Part 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  Prohibited Substance or any Prohibited Method which is prohibited Out-of-Competition  unless the Athlete  establishes that the Possession  is consistent with a Therapeutic Use Exemption  (“TUE”) granted in ac cordance with Article 4.4 or other acceptable justification.