5.4 The Principle of L ast Resort  5.4.1  Consistent with the principle of  ‘last resort’, in any case (including not only ordinary but also fast  track cases), if a Signatory does not meet the required timeframes for correcting Non-Conformities and so the case is referred to the CRC  and beyond, provided that the Signatory  corrects the Non-Conformities  at any time before Signatory  Consequences  are imposed by CAS , then no Signatory  Consequences  shall be imposed, save to the extent that (a) costs have been incurred in pursuing the case before CAS (in which case the Signatory must cover those costs); and/or (b) the failure to correct a Non -Conformity within the requir ed timeframe has resulted in irreparable prejudice to the fight against doping in sport (in which case Signatory  Consequences  may be imposed to reflect that prejudice).