1.
Each of the subsystems shall be covered by one TSI. Where necessary, a subsystem may be covered by several TSIs and one TSI may cover several subsystems. The decision to develop or to revise a TSI and the choice of its technical and geographical scope requires a mandate in accordance with Article 6(1).
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Source: EUR-Lex (Cellar) · retrieved 2026-10-29 · Text as adopted (Official Journal); later amendments are not incorporated in this text.