6.6 Further Analysis of a Sample  after it has been Reported as Negative or has Otherwise not Resulted in an Anti -Doping Rule Violation Charge  After a laboratory has reported a Sample  as neg ative, or the Sample  has not otherwise resulted in an anti -doping rule violation charge, it may be stored and subjected to further analyses for the purpose of Article 6.2 at any time exclusively at the direction of either the Anti-Doping Organisation  that initiated and directed Sample  collection or WADA .