The "Nihil obstat" of Rome
It is part of the duties of an actor in a cause to ask for the approval of the Congregation of Saints, located in Rome, to continue the research and the procedures.
Rome, having a great habit of dealing with the causes of Saints, is better placed than anyone to give discernment on the person in question. The letter with the affirmation that "nothing prevents" from continuing the research thus confirms the local intuition on the heroism of Élise's virtues.
Now the road is free to collect testimonies and study Elise's texts with a view to putting together a file ready for the Congregation of Saints.