1. The competent authorities may temporarily detain cash by means of an administrative decision in accordance with the conditions laid down in national law where:
(a) the obligation to declare accompanied cash under Article 3 or the obligation to disclose unaccompanied cash under Article 4 has not been fulfilled; or
(b) there are indications that the cash, irrespective of the amount, is related to criminal activity.
2. The administrative decision referred to in paragraph 1 shall be subject to an effective remedy in accordance with procedures provided for in national law. The competent authorities shall notify a statement of reasons for the administrative decision to:
(a) the person required to make the declaration in accordance with Article 3 or the disclosure declaration in accordance with Article 4; or
(b) the person required to provide the information in accordance with Article 6(1) or (2).
3. The period of temporary detention shall be strictly limited under national law to the time