This is Rule 171 from the UPCRoP (Verfahrensordnung des Einheitlichen Patentgerichts), which is part of the legal framework governing the Unified Patent Court in Europe.
A party making a statement of fact that is contested or likely to be contested by the other party shall indicate the means of evidence to prove it. In case of failure to indicate the means of evidence regarding a contested fact, the Court shall take such failure into account when deciding the issue in question.
A statement of fact that is not specifically contested by any party shall be held to be true as between the parties.
This legal text is from the official UPCRoP framework governing the Unified Patent Court.
Reference: UPCRoP 171 (Rule 171)
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