For initial informal contact, the General Contact email for international relations is preferred.  In case of contact related to investigations (cartels, abuse of dominance, unlawful mergers, market investigations and determinations of lack of effective competition conditions), contact can be made directly with the Investigative Authority.  Once contact has been made, the Commission will identify mechanisms that allow for formal and/or informal cooperation through official means, in which case, communications and all resultant communications will have to comply with conditions of an agreement, national regulation, or else, conditions of a waiver.