Substance of Abuse: See Article 4.2.3.Substantial Assistance: For purposes of Article 10.7.1, a Person providing Substantial Assistance must: (1) fully disclose in a signed written statement or recorded interview all information they possess in rela-tion to anti-doping rule violations or other proceeding described in Article 10.7.1.1, and (2) fully coop-erate with the investigation and adjudication of any case or matter related to that information, including, for example, presenting testimony at a hearing if requested to do so by an Anti-Doping Organisation or hearing panel.