The FSPPX chess game that recognizes the 1983 Code of Canon Law just to get a suspension of the sentence. The Lefebvre precedent in 1975 and the moods at the Dicastery for the Doctrine of the Faith (with a doubt about the legitimacy of the appeal's presentation).
The appeal allows the SSPX to confront the Modernists. Something the Modernists have avoided for years. Pope Pius X wrote Pascendi Dominici Gregis in 1907. This appeal needs to take place.