ACER
EU energy regulator coordinating national agencies and enforcing REMIT market surveillance rules.
Last refreshed: 13 April 2026 · Appears in 1 active topic
Can ACER's 20-day compliance window survive a gas crisis driving up volatility?
Timeline for ACER
Mentioned in: TTF swings EUR 9 in a week
European Energy MarketsPublished recast REMIT Implementing Regulation and Delegated Regulation on 9 April
European Energy Markets: ACER rewrites REMIT rules with 20-day windowLaunched call-for-evidence on REMIT investigatory powers and convened LNG price assessment Expert Group
European Energy Markets: ACER reviews its own powers and LNG pricing- What is ACER and what does it do in European energy markets?
- ACER, the Agency for the Cooperation of Energy Regulators, coordinates national energy regulators across the EU and enforces REMIT market surveillance rules. It gained direct investigatory powers in the 2024 REMIT amendments.
- What are the new REMIT rules ACER published in April 2026?
- ACER published a recast Implementing Regulation and a companion Delegated Regulation on 9 April 2026, entering force on 29 April. They replace the 2014 data-reporting framework and standardise oversight of reporting platforms.Source: ACER
- Is ACER reviewing its own powers in 2026?
- Yes. ACER launched a formal call-for-evidence evaluation running to 6 May 2026, assessing its performance under expanded investigatory powers granted by the 2024 REMIT amendments.Source: ACER
- How does ACER set LNG prices in Europe?
- ACER does not set LNG prices but publishes a price assessment methodology used as a reference. It updated this methodology in April 2026 and convened a dedicated Expert Group to improve LNG market transparency.Source: ACER
Background
ACER rewrote its core market surveillance rules in April 2026, publishing two new REMIT instruments on 9 April: a recast Implementing Regulation replacing the 2014 data-reporting framework, and a companion Delegated Regulation standardising oversight of Registered Reporting Mechanisms and Inside Information Platforms. Both enter force on 29 April 2026, giving compliance teams just 20 days. Simultaneously, ACER launched a call-for-evidence to assess its own performance under expanded investigatory powers granted by the 2024 REMIT amendments, running to 6 May 2026.
ACER, the Agency for the Cooperation of Energy Regulators, was established in 2009 under the EU's Third Energy Package and formally operational from 2011. Based in Ljubljana, Slovenia, it coordinates national energy regulators across the EU's 27 member states and Norway, Iceland, and Liechtenstein. Under the 2019 REMIT II update and subsequent 2024 amendments, ACER acquired direct investigatory and sanctioning powers over energy market manipulation and insider trading, a significant expansion beyond its original coordination mandate.
ACER occupies a pivotal position in the EU energy governance architecture: it bridges national regulators and the Commission, sets common technical standards for data reporting, and provides the data backbone for market surveillance. Its updated LNG price assessment methodology and newly convened Expert Group signal a push to strengthen transparency in a market still rattled by supply disruptions from the Iran conflict.
