1. In order to fulfil their duties under this Regulation, competent authorities referred to in Article 40(2) shall have, in conformity with national law, at least the following supervisory and investigatory powers:

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

(b) require or demand information from any person involved in the provision of, and contribution to, a benchmark, including any service provider to which functions, services or activities in the provision of a benchmark have been outsourced as provided for in Article 10, as well as their principals, and if necessary, summon and question any such person with a view to obtaining information;

(c) request, in relation to commodity benchmarks, information from contributors on related spot markets according, where applicable, to standardised formats and reports on transactions, and direct access to traders' systems;

(d) carry out on-site inspections or investigations, at sites other than the private residences of natural persons;