A chain of identifiers
The 17 templates of RESOL 2 are joined by identifiers the institution assigns itself, and they have to be filled in order. The five Z 07.01 templates carry the criticality assessment, one per Member State, split by activity: deposits, lending, payments and custody, capital markets, and wholesale funding. They produce the function identifiers.
Z 07.02 maps those functions to legal entities; Z 07.03 lists core business lines and the entities that carry them, assigning business line identifiers; Z 07.04 joins functions to business lines. Z 08.01 inventories relevant services and assigns a service identifier that Z 08.02 to Z 08.05 reuse to map services to assets, roles, critical functions and business lines. Z 09.01 assigns the combination of user, FMI, system type and intermediary that Z 09.02 to Z 09.04 reuse.
Several templates declare an explicit primary key made of named columns. Duplicate keys are the most common structural rejection in this block.
Criticality is a judgement the authority tests
A function is critical where its discontinuation would be likely to lead to disruption of services essential to the real economy or to financial stability in a Member State. The institution states its own conclusion in these templates — with market shares, volumes and substitutability evidence beside it — and the resolution authority forms its own view. The same logic applies to services and to FMI relationships: only those assessed as critical or essential belong in the mapping templates.
What follows from the assessment is concrete: operational continuity requirements, contractual safeguards with providers, and continued access to FMIs arrangements that have to survive a resolution weekend.