preamble_32
(19) The performance of the air navigation services system as a whole at European level should be assessed on a regular basis, with due regard to the maintenance of a high level of safety, to check the effectiveness of the measures adopted and to propose further measures.
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Source: EUR-Lex (Cellar) · retrieved 2026-11-07 · Text as adopted (Official Journal); later amendments are not incorporated in this text.