24.7.5  For purposes of assessing the period of Ineligibility  for a second violation under Article 10.9.1, where the sanction for the first violation was determined based on rules in force prior to the Effective Date, the period of Ineligibility  which would have been assessed for that first violation had these Anti-Doping Bye-Laws been applicable, shall be applied.74  24.7.6  Changes to the Prohibited List  and Technical Documents  relating to substances or methods on the Prohibited List  shall not, unless they specifically provide otherwise, be applied retroactively.