3.

If the Office considers it necessary for a party, witness or expert to give evidence orally, it shall issue a summons to the person concerned to appear before it. The period of notice provided in such summons shall be at least one month, unless they agree to a shorter period.

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Source: EUR-Lex CELLAR · retrieved 2026-09-04 · Text as consolidated on 2025-12-01; changes after this date are not shown.