art_9__para_1__point_a__text_1
for a proposed new subsystem, for the renewal or upgrading of an existing subsystem, or for any element referred to in Article 1(1) at an advanced stage of development or the subject of a contract in the course of performance when these TSIs are published;
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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.