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 Organization  that initiated and direct ed Sample  collection  or WADA .