ACER's New Cross-Border Investigation Rules Reshape EU Wholesale Energy Market Oversight
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SHERIDAN, WYOMING - April 03, 2026 - Wholesale energy market participants operating across EU borders now face a materially different compliance environment: ACER's newly published Rules of Procedure for cross-border investigations establish the procedural framework under which the agency exercises its expanded investigatory mandate, granted by EU legislators in 2024 under the revised REMIT framework. The 43rd edition of the REMIT Quarterly sets out these rules in full and signals an accelerating enforcement posture across European energy markets.