1. Member States shall ensure that, where a worker has not received in due time all or part of the documents referred to in Article 5(1) or Article 6, one or both of the following shall apply:
(a)
the worker shall benefit from favourable presumptions defined by the Member State, which employers shall have the possibility to rebut;
(b)
the worker shall have the possibility to submit a complaint to a competent authority or body and to receive adequate redress in a timely and effective manner.
2. Member States may provide that the application of the presumptions and mechanism referred to in paragraph 1 is subject to the notification of the employer and the failure of the employer to provide the missing information in a timely manner.