7 min read · EBA reporting framework 4.2 · Updated 10 November 2026

Loss-absorbing capacity: every EBA validation rule in plain words (MREL and TLAC)

Resolution reporting gives resolution authorities the data to plan how a failing bank could be resolved in an orderly way: its legal entities, liabilities, critical functions and links to market infrastructure. MREL and TLAC reporting shows whether it holds enough capacity to absorb losses. Both use EBA templates and travel in XBRL.

EBA's 4.2 package has 112 validation rules for it. Line4 Check runs 98 of them (317 written-out checks): 0 can block a filing and 98 are warnings. EBA has switched 4 off. 10 are not run yet.

98rules Line4 Check runs
0can block a filing
98warnings
317written-out checks

The rules, by template

Each rule in plain words, its code in brackets. Open one for what to do if your filing fails it. A rule that reads more than one template is listed under the first.

MREL and TLAC key metrics (resolution groups / entities) (KM2) (M 01.00)19 rules
MREL and TLAC capacity and composition (resolution groups / entities) (TLAC1) (I) (M 02.00.a)22 rules
MREL and TLAC capacity and composition (resolution groups / entities) (TLAC1) (II) (M 02.00.b)1 rule
MREL and TLAC capacity and composition (resolution groups / entities) (TLAC1) (III) (M 02.00.c)6 rules
Internal MREL and internal TLAC (ILAC) (M 03.00)25 rules
Funding structure of eligible liabilities (LIAB MREL) (M 04.00)16 rules
Creditor ranking (entity that is not a resolution entity) (TLAC2) (M 05.00)4 rules
Creditor ranking (resolution entities) (TLAC3) (M 06.00)4 rules
Instruments governed by third-country law (MTCI) (M 07.00)1 rule
4 rules EBA has switched off

EBA has switched these off, in its 4.2 severity package or since then in its list of validation rules (latest update 12 October 2026): they do not apply to 4.2 filings.

v10777_m, v10812_m, v22338_m, v22339_m

10 rules not run yet

Their EBA formulas need parts of the XBRL formula language Line4 Check does not cover yet. Your authority's validation runs them.

v10767_m, v10768_m, v10769_m, v10770_m, v10771_m, v10779_m, v10805_m, v10809_m, v10814_m, v10817_m

Checks like this one, run at the point of submission, are the first step to real-time supervision. See every return on EBA validation rules in plain words.