1. The Agency shall, by means of a decision, impose a periodic penalty payment in respect of a person subject to an investigation in order to compel that person:

(a) to submit to an on-site inspection ordered by a decision adopted pursuant to Article 13a(6);

(b) to supply the information requested by a decision adopted pursuant to Article 13b(2).

2. The periodic penalty payment shall be imposed on a daily basis until the person concerned complies with the relevant decisions referred to in Article 13a(6) or Article 13b(2).