faith or with arbitrariness. In CAS 2010/A/2090, the CAS Panel explained that the reason for this is not a matter of jurisdiction but arbitral self-restraint. In October 2011, in a case affecting the 2012 Summer Olympics, the court declared that a part of the Olympic Charter violated the World Anti-Doping Code. The "Osaka rule" therein had prevented athletes suspended for at least six months for anti-doping rule violations from competing at the Olympic Games following the suspension's expiration. The court later reaffirmed this decision, when it struck down a long-standing by-law of the British Olympic Association (BOA) preventing the selection of athletes sanctioned for doping. Both the IOC and BOA have responded by campaigning for adding a similar rule to the World Anti-Doping Code. In July 2016, CAS confirmed that the Russian Olympic Committee (ROC) could not enter track and field athletes for the 2016 Summer Olympics, except for those cleared by the IAAF under the new competition rules regarding "neutral athletes". As the IOC was not a party to the case, the panel found it lacked jurisdiction to decide on whether the IOC could allow such cleared athletes to represent Russia, allow them to compete independently, or refuse their participation entirely. The claimants disputed the validity and enforceability of IAAF Competition rule 22.1(a), regarding the suspension of the national federation (RusAF, formerly ARAF), and rule 22.1A, regarding the eligibility of athletes from suspended federations. The panel found that neither rule could be construed as sanctions, and for this and other reasons, they were consistent with the World Anti-Doping Code. The panels commented on the futility of the challenge to the new rule 22.1A, noting that as the rule provided athletes from Russia a new route to participation, a successful challenge would lead to the exclusion of athletes eligible under the rule, not the inclusion of other athletes. The panel decided against evaluating whether the principle of estoppel applies to sporting disputes, as it found the claims, in this case, would have failed. At the same time, in a separate decision, the panel rejected the appeals of 67 Russian athletes against the decisions of the IAAF denying their applications to appear as "neutral athletes" at the 2016 Summer Olympics. Darya Klishina was the only Russian athlete cleared by both the IAAF and the IOC. However, the IAAF declared her ineligible on 12 August based on new information. On 15 August,