35It is apparent from the case-law that Rule 17(2) of the implementing regulation, according to which the evidence submitted in support of an opposition must be submitted in the language of the opposition proceedings or accompanied by a translation into that language (see paragraph 2 above), is justified by the necessity to observe the principle of the right to be heard and to ensure equality of arms between the parties in inter partes proceedings (Case T-232/00 Chef Revival USA v OHIM — Massagué Marín (Chef) [2002] ECR II-2749, paragraph 42, and BIOMATE, paragraph 72).
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