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 charg e, 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 Organization  that initiated and directed Sample  collection or WADA .