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Parliamentary questions
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13 July 2018
Answer given by President Juncker on behalf of the Commission
Question reference: E-002471/2018

In Declaration no 17 concerning primacy(1), the Conference of the Representatives of the Governments of the Member States which has adopted the Treaty of Lisbon has recalled that, in accordance with well settled case-law of the Court of Justice dating back to 1964(2), Union law has primacy over the law of Member States.

It follows from that case-law that ‘rules of national law, even of a constitutional order, cannot be allowed to undermine the effectiveness of EC law on the territory of that State’(3).

The Commission endeavours to always consider carefully the consequences of its proposals for national law. This is one of the elements which are examined as part of the impact assessments carried out for initiatives expected to have significant economic, social or environmental impacts.

Furthermore, and should a Member State raise the issue of possible incompatibility of a Commission proposal with its national constitution, the Council will consider it before adopting the proposal.

(1)OJ C306, 17.12.2007, p. 256.
(2)Judgment of 15 July 1964, Costa/ENEL, 6/64, ECLI:EU:C:1964:66.
(3)Judgment of 26 February 2013, Melloni, C-399/11, EU:C:2013:107, paragraph 59.

Last updated: 13 July 2018Legal notice