1. The Executive Board may adopt a decision imposing a periodic penalty payment in order to compel:
(a) a selected obliged entity to put an end to a breach, where it fails to comply with an administrative measure applied pursuant to Article 21(2), point (b), (d), (e) or (f), and Article 21(3);
(b) a person referred to in Article 17(1) to supply complete information which has been required by a decision pursuant to Article 6(1);
(c) a person referred to in Article 17(1) to submit to an investigation and in particular to produce complete records, data, procedures or any other material required and to complete and correct other information provided in an investigation launched pursuant to Article 18.
2. The periodic penalty payment shall be effective and proportionate. The periodic penalty payment shall be imposed until the selected obliged entity or person concerned complies with the relevant administrative measure referred to in paragraph 1.
3. Notwithstanding paragraph 2, the amount of
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