(1) A competent authority may request a competition authority of another Member State to enforce a decision of an adjudication officer under section 15X which has become final.
(2) A competent authority shall, without undue delay following receipt of a request of a competition authority in another Member State, take steps to enforce a final decision of that authority imposing administrative fines or periodic penalty payments adopted in accordance with Article 13 or 16 of the Directive.
(3) Subsection (2) shall apply only to the extent that the requesting competition authority has made reasonable efforts to ascertain that the undertaking or association of undertakings against which the administrative fine or periodic penalty payment is enforceable does not have sufficient assets in the Member State of the requesting competition authority to enable recovery of such administrative fine or periodic penalty.
(4) In circumstances other than those set out in subsections (2) and (3) a competen
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