1. Competent authorities shall exercise their functions and powers in any of the following ways:

(a) directly;

(b) in collaboration with other authorities or with the market undertakings;

(c) under their responsibility by delegation to such authorities or to market undertakings;

(d) by application to the competent judicial authorities.

2. In order to fulfil their duties under this Regulation, competent authorities shall have, in accordance with national law, at least the following supervisory and investigatory powers:

(a) to access any document and data in any form, and to receive or take a copy thereof;

(b) to require or demand information from any person, including those who are successively involved in the transmission of orders or conduct of the operations concerned, as well as their principals, and if necessary, to summon and question any such person with a view to obtain information;

(c) in relation to commodity derivatives, to request information from market participants on related spot markets according to standardised formats, obtain reports on transactions, and have direct access to traders' systems;