1. ACER, in close cooperation with the Commission, the Member States and the relevant national authorities, including the regulatory authorities, and without prejudice to the competences of competition authorities, shall monitor the wholesale and retail markets in electricity and natural gas, in particular the retail prices of electricity and natural gas, compliance with the consumer rights laid down in Directive (EU) 2019/944 and Directive 2009/73/EC, the impact of market developments on household customers, access to the networks including access of electricity produced from renewable energy sources, the progress made with regard to interconnectors, potential barriers to cross-border trade, regulatory barriers for new market entrants and smaller actors, including citizen energy communities, state interventions preventing prices from reflecting actual scarcity, such as those set out in Article 10(4) of Regulation (EU) 2019/943, the performance of the Member States in the area of security of supply of electricity based on the results of the European resource adequacy assessment as referred to in Article 23 of that Regulation, taking into account, in particular, the ex-post evaluation referred to in Article 17 of Regulation (EU) 2019/941.
2. ACER shall publish annually a report on the results of the monitoring referred to in paragraph 1. In that report, it shall identify any barriers to the completion of the internal markets for electricity and natural gas.
3. When publishing its annual report, ACER may submit to the European Parliament and to the Commission an opinion on the possible measures to remove the barriers referred to in paragraph 2.
4. ACER shall issue a best practices report on transmission and distribution tariffs methodologies pursuant to Article 18(9) of Regulation (EU) 2019/943.