The Commission is the sole authority empowered to enforce this Regulation. In order to support the Commission, it should be possible for Member States to empower their national competent authorities enforcing competition rules to conduct investigations into possible non-compliance by gatekeepers with certain obligations under this Regulation. This could in particular be relevant for cases where it cannot be determined from the outset whether a gatekeeper’s behaviour is capable of infringing this Regulation, the competition rules which the national competent authority is empowered to enforce, or both. The national competent authority enforcing competition rules should report on its findings on possible non-compliance by gatekeepers with certain obligations under this Regulation to the Commission in view of the Commission opening proceedings to investigate any non-compliance as the sole enforcer of the provisions laid down by this Regulation.