In examining the opposition, the Opposition Division will invite the parties, as often as is necessary, to clarify the substance of the case, to file observations, within a period to be fixed by the Opposition Division, on communications from another party or issued by itself (see E-I, 1) and, where appropriate, to adduce evidence in respect of matters under dispute. As regards the length of the period see E-VIII, 1.2, as regards the extension of a period see E-VIII, 1.6 and as regards late submission of observations see E-VIII, 1.7 and 1.8, as well as Art. 114(2).

Communications from the Opposition Division and all replies thereto must be communicated to all parties.