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 negative, 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 .