As an exception, however, when a Prohibited Substance  has been removed from the Prohibited List , an Athlete  or other Person  currently serving a period of Ineligibility  on acc ount of the formerly Prohibited Substance  may apply to the WSF, or other Anti-Doping Organisation which had Results Management  responsibility for the anti -doping rule violation, to consider a reduction in the period of Ineligibility  in light  of the removal  of the substance from the Prohibited List .