Fröbrich gegen Deutschland, Nr. 23621/11 vom 16. März 2017 § 35: «The exceptional character of the circumstances that may justify dispensing with an oral hearing in proceedings concerning a “civil” right essentially comes down to the nature of the issues to be decided by the competent national court, not to the frequency of such situations […] This does not mean that refusing to hold an oral hearing may be justified only in rare cases […]. The Court has accepted exceptional circumstances in cases where the proceedings concerned exclusively legal or highly technical questions […]. There may be proceedings in which an oral hearing may not