ISL – January 2021 Page 112 of 160 in ADAMS  20, 21  or for a longer period as informed to the Laboratory , in writing, by the relevant Testing  Authority , Results Managem ent Authority  or WADA 19. d) Plasma /serum “A” and “B” Sample(s)  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  5.3.11.2) that the analysis of a serum/plasma 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.