1. Member States shall ensure that undertakings providing electronic communications networks and services provide all the information, including financial information, necessary for national regulatory authorities to ensure conformity with the provisions of, or decisions made in accordance with, this Directive and the Specific Directives. In particular, national regulatory authorities shall have the power to require those undertakings to submit information concerning future network or service developments that could have an impact on the wholesale services that they make available to competitors. Undertakings with significant market power on wholesale markets may also be required to submit accounting data on the retail markets that are associated with those wholesale markets.
Undertakings shall provide such information promptly upon request and in conformity with the timescales and level of detail required by the national regulatory authority. The information requested by the nati