preamble_18
(7) The amendments necessary for adaptation to scientific and technical progress may relate solely to criteria and techniques for the assessment of concentrations of benzene and carbon monoxide or detailed arrangements for forwarding information to the Commission, and may not have the effect of modifying limit values either directly or indirectly.
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Source: EUR-Lex (Cellar) · retrieved 2026-10-12 · Text as adopted (Official Journal); later amendments are not incorporated in this text.