CACM Regulation
CACM is Commission Regulation (EU) 2015/1222, the EU guideline on capacity allocation and congestion management. It is the legal base for day-ahead and intraday market coupling, NEMO designation, capacity-calculation regions, coordinated capacity calculation and congestion-management methods across European bidding zones.
The CACM Regulation is Commission Regulation (EU) 2015/1222: the EU guideline on capacity allocation and congestion management. It is the legal foundation for European day-ahead and intraday market coupling, including SDAC, SIDC, NEMO designation, capacity-calculation regions, coordinated capacity calculation and congestion-management methods.
What CACM governs
CACM sets the framework for calculating capacity between bidding zones, allocating that capacity through market coupling, managing residual congestion and reviewing bidding-zone definitions. It requires TSOs, NEMOs, regulators and ACER to develop detailed terms, conditions and methodologies. Those methodologies decide how much cross-zonal capacity reaches the auctions and how the algorithms use it.
Estonian relevance
The Baltic day-ahead and intraday capacity-calculation methodology, Estonia-Finland capacity treatment, Nordic-Baltic coupling and intraday auctions all sit under CACM. When a Volton data page mentions available transfer capacity, capacity calculation, a bidding-zone border, a NEMO process or a congestion-management rule, CACM is usually the upstream legal instrument.
Sources
EUR-Lex: Regulation (EU) 2015/1222 · ACER: Capacity Allocation and Congestion Management