5.5.3  Where an Athlete is included in an international Registered Testing Pool by WAKO and in a  national Registered Testing  Pool by their National Anti-Doping Organization , the National Anti -Doping Organization  and WAKO shall agree between themselves which of them shall accept that Athlete's whereabouts filings; in no case shall an Athlete be requir ed to make whereabouts filin gs to more than one of them .