1.
A qualified electronic time stamp shall meet the following requirements: it binds the date and time to data in such a manner as to reasonably preclude the possibility of the data being changed undetectably; it is based on an accurate time source linked to Coordinated Universal Time; and it is signed using an advanced electronic signature or sealed with an advanced electronic seal of the qualified trust service provider, or by some equivalent method.
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Source: EUR-Lex (Cellar) · retrieved 2026-10-28 · Text as adopted (Official Journal); later amendments are not incorporated in this text.