47A.— The F99[Commission for Communications Regulation] has, in addition to its other functions under this Act or any other enactment, the function of investigating, either on its own initiative or in response to a complaint made to it by any person, the existence of an agreement, decision or practice of a kind specified in section 4 F100[or Article 101 of the Treaty on the Functioning of the European Union], or the occurrence of an abuse of the kind specified in section 5F100[or Article 102 of the Treaty on the Functioning of the European Union], involving the provision of an electronic communications service or electronic communications network, or associated facilities. ]