ACER publishes guidance on energy market rule update

The European Union Agency for the Cooperation of Energy Regulators (ACER) on Thursday published two letters explaining the regulatory frameworks, which are set to become enforceable on April 29, 2026.

“The recast REMIT has ‘Implementing Regulation’ that sets out updated rules for reporting energy market data to ACER, directly affecting all reporting parties,” the regulator said, adding that it aims to reduce reporting burdens while enabling more effective market monitoring and detection of potential abuses.

In parallel, the new ‘Delegated Regulation’ (secondary legislation) introduces authorisation and supervision processes for: registered reporting mechanisms (RRMs) related to reporting energy data; and inside information platforms (IIPs) for disclosure of inside information like power outages or capacity issues.

The watchdog’s letter on the secondary regulation explains the authorisation of new and registered RRMs and IIPs, and key changes for ‘clients’ of RRMs and IIPs under the new authorisation regime,

“Together, these two acts aim to improve standardised data reporting, strengthen the supervision of REMIT data reporting entities and help ensure transparency and integrity in EU wholesale energy markets,” ACER said.

Swedish fintech firm Scila in January said REMIT II rules led to increase in demand for a robust, engineering-first platform to ensure full compliance with the new comprehensive EU energy framework.

A group of 11 trade bodies in November 2023 called on European authorities to extend the period for the application of the revised REMIT II rules from the proposed six months to at least 12 months.