Decisions 24.06.2026 ACER Decision No 08-2026 on the first amendment to the regional coordination centre regional sizing of reserve capacity methodology Annexes ACER Decision 08-2026 on RCC sizing methodology - Annex I ACER Decision 08-2026 on RCC sizing methodology - Annex Ia ACER Decision 08-2026 on RCC sizing methodology - Annex II ACER Decision 08-2026 on RCC sizing methodology - Annex IIa Feedback