4. L'autorité compétente informe dès que possible et, en tout état de cause, conformément aux dispositions pertinentes du droit national, les personnes visées au paragraphe 1 qui ont soumis des observations à l'autorité de sa décision d'agir ou non, en indiquant les raisons qui motivent celle-ci.
4. The competent authority shall, as soon as possible and in any case in accordance with the relevant provisions of national law, inform the persons referred to in paragraph 1, which submitted observations to the authority, of its decision to accede to or refuse the request for action and shall provide the reasons for it.