Judgment of the General Court (Second Chamber, Extended Composition) of 15 February 2023.#Austrian Power Grid AG and Others v European Union Agency for the Cooperation of Energy Regulators.#Energy – Internal market in electricity – Framework for the implementation of the European platform for the exchange of balancing energy from frequency restoration reserves with automatic activation – Procedure for the adoption of terms, conditions and methodologies – Rejection of the joint proposal of the system operators – Competence of ACER – Error of law – Rights of the defence – Obligation to state reasons.#Case T-606/20.