In addition to that, the document points to the sanctions nature of the invitation criteria applied by the IOC, their substantial expansion compared to those approved by the IOC Executive Board in its decision made on December 5, 2017 (the Executive Board approved of three criteria, while the Invitation Review Panel was guided by 17 criteria), violations of individual athletes' rights and abuse of IOC monopoly position.
"We share the distress, uncertainty and frustration expressed by many athletes on the news of this ruling and believe this decision to be a massive setback for clean sport", the WADA athlete committee said.
The IOC in December banned Russian Federation from the Olympics, citing its "unprecedented systematic manipulation" of the Olympic anti-doping system.
Russia's team has been banned from Pyeongchang, although 168 "clean" Russian athletes were cleared to take part under a neutral flag as "Olympic Athletes from Russia".
Any Russians who win late invitations would compete under "Olympic Athletes from Russia" because the Russian team is formally banned for doping at the Sochi Olympics.
Three days before the start of the 23rd Olympic Winter Games, almost three dozen Russian athletes on Tuesday filed a last-minute appeal to have their doping bans lifted so they can compete in Pyeongchang.
In a statement Monday, the International Olympic Committee said part of its ruling was because "the full reasoning for these decisions had not been made public" by CAS.
More Russian athletes appeal Pyeongchang ban to CAS
Among the athletes making the case is South Korea-born Victor Ahn, the most decorated short-track speedskater in Olympic history with six gold medals.
If the Russian athletes force the International Olympic Committee to invite them, it would mean the medal contenders in some sports change dramatically only days before the games open on Friday.
"Following the detailed analysis conducted by the Panel, its members observed that there were additional elements and/or evidence, which could not be considered by the IOC" IOC Oswald Commission because it was not available to it, that raised suspicion about the integrity of these athletes.
Speaking at the Olympic village, IOC President Thomas Bach on Monday repeated again his disquiet over the CAS ruling and said an appeal was possible.
"We only know about the reasons from a very few sentences in a press release". Each athlete was considered individually and anonymously.
"I feel that the CAS arbitrators have applied a level of evidence that has never been used in the past by the CAS or the Swiss Federal Court", Oswald said, adding that this was not a criminal trial "where the accused must benefit from any doubt".
"The decision is hard to explain. We can only speculate as we have not received yet the motivation".