preamble_51

(41) Whereas, in accordance with the principle of subsidiarity, the rules on eligible expenditure should be the relevant national rules where there are no Community rules, although they may be laid down by the Commission where they are clearly needed for the uniform and equitable implementation of the Structural Funds across the Community; whereas, however, the starting and closing dates for the eligibility of expenditure should be defined and it should be stipulated that investment projects may not undergo major modification; whereas consequently, in order to ensure the efficiency and durable impact of the Funds' assistance, all or part of the assistance from a Fund should remain attached to an operation only where its nature or its implementation conditions do not undergo a substantial modification which would result in diverting the assisted operation from its original objectives;

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Source: EUR-Lex (Cellar) · retrieved 2026-11-08 · Text as adopted (Official Journal); later amendments are not incorporated in this text.