Where the Examining or Opposition Division holds hearings for the purpose of taking evidence (see E-III, 1.3) and if the case in question is expected to give rise to particular legal issues, it is advisable that the Division should be enlarged by the addition of a legally qualified examiner, if this is not already the case (see D-II, 2.2).
The evidence of witnesses is normally taken at oral proceedings.
Where a hearing is held in connection with oral proceedings, the considerations set out in E-II, 8.2, E-II, 8.3, E-II, 8.9 and E-II, 8.10 are directly applicable, and where this is not the case they apply mutatis mutandis.
The hearing of an "expert" in the sense of Rule 117 requires as a precondition a decision to take evidence (see E-III, 1.4). This is different from hearing oral submissions by a person accompanying the representative during oral proceedings, which can be allowed at the discretion of the Division (see G 4/95 and E-II, 8.5).