For these purposes, the retrospective periods in which prior violations can be considered for purposes of multiple violations under Article 10.9.4 and the stat ute of limitations set forth in Article 16 are procedural rules, not substantive rules, and should be applied retroactively along with all of the other procedural rules in these Anti -Doping Rules (provided, however, that Article 16 shall only be applied re troactively if the statute of limitations period has not already expired by the Effective Date).