However:24.7.1   Anti-doping rule violations taking place prior to the Effective Date count as "first violations" or "second violations" for purposes of determining sanctions under Article 10 for violations taking place after the Effective Date.24.7.2   Any anti-doping rule violation case which is pending as of the Effective Date and any anti-doping rule violation case brought after the Effective Date based on an anti-doping rule violation which occurred prior to the Effective Date, shall be governed by the substantive anti-doping rules in effect at the time the alleged anti-doping rule violation occurred, and not by the substantive anti-doping rules set out in these Anti-Doping Rules, unless the panel hearing the case determines the principle of “lex mitior” appropriately applies under the circumstances of the case.