1. ACER shall monitor the execution of the tasks of the ENTSO for Gas referred to in Article 26(1), (2) and (3) and report its findings to the Commission.
ACER shall monitor the implementation by the ENTSO for Gas of network codes elaborated pursuant to Article 26(2) and network codes which have been developed in accordance with Article 71(1) to (12) but which have not been adopted by the Commission pursuant to Article 71(13). Where the ENTSO for Gas has failed to implement such network codes, ACER shall request the ENTSO for Gas to provide a duly reasoned explanation as to why it has failed to do so. ACER shall inform the Commission of that explanation and provide its opinion thereon.
ACER shall monitor and analyse the implementation of the network codes and the guidelines adopted by the Commission as laid down in Articles 70, 71, 73 and 74, and their effect on the harmonisation of applicable rules aimed at facilitating market and energy system integration as well as on non-discrimination, effective competition and the proper functioning of the market, and report to the Commission.