21 Nevertheless, the Laboratory  shall contact and inform the relevant Testing  Authority  and WADA before disposing of any Samples  with Adverse Analytical Findings  for which the Testing  Authority  or Results Management  Authority     ISL – January 2021 Page 111 of 160 Laboratory , in writing, by the relevant Testing  Authority , Results Management  Authority  or WADA 19. d) Urine  Samples  under challenge, dispute or investigation : If the Laboratory  has been informed by the Testing  Authority , the Results Management  Authority  or WADA  (in writing and within the applicable storage period as defined in this Article  5.3.11.1) that the analysis of a urine Sample  is challenged, disputed or under investigation, the Laboratory  shall retain both the “A” and “B” Samples  until further notice by the Testing  Authority , the Results Management  Authority  or WADA , as applicable 19.