3.
The levy shall be imposed in accordance with Union law, and shall respect in particular the principles of fairness, transparency, non-discrimination and proportionality, in particular between the average price of the service to the passenger and the level of the levy. The total levies imposed pursuant to this paragraph shall not endanger the economic viability of the rail passenger transport service on which they are imposed.
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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.