Line4

1 min readBlockingEIOPA taxonomy 2.10.0Updated 11 November 2026

All entity IDs mentioned in Z0020 in S.04.04 or S.04.05 need to be presented in S.04.03 C0010 (S.04.03, S.04.04, S.04.05, EIOPA rule BV1976)

A blocking check on the basic information - list of underwriting entities (S.04.03), activity by country- location of underwriting (S.04.04) and activity by country - location of risk (S.04.05) templates, in the annual solo (ARS) return.

It applies to 2.8.2 returns too, the release for the 2026 returns, and Line4 Check runs it there as well.

Check your file for this ruleWhat to do if it fails

The rule in plain words

All entity IDs mentioned in Z0020 in S.04.04 or S.04.05 need to be presented in S.04.03 C0010

What to do if your return fails it

  1. 01Open the tables below and find the cells the rule reads.
  2. 02The check applies only when its first part holds in your return. When it does, the second part must hold too: fix the second part, or correct the first.
  3. 03It runs only when your filing indicators mark S.04.03, S.04.04 and S.04.05 as reported.
  4. 04This is a blocking check. A return that fails it is normally rejected, so fix it before you submit.

The cells it reads

Basic information - list of underwriting entities: list of underwriting entities (S.04.03.01.01)

Column

  • C0020Type of underwriting entity

Activity by country- location of underwriting: by underwriting entity (S.04.04.01.01)

Row

  • R0020Premiums written (gross)

Column

  • C0010Business underwritten in the country of establishment

Activity by country - location of risk: total underwriting entity activity (S.04.05.01.01)

Row

  • R0020Premiums written (gross)

Column

  • C0010Total of business written by the underwriting entity

Activity by country - location of risk (S.04.05.01.02)

Row

  • R0020Premiums written (gross)

Column

  • C0020Total by country

Which returns it applies to

Line4 Check runs it on annual solo (ARS) return on EIOPA taxonomy 2.10.0. EIOPA applies it to annual solo (ARS) and annual ECB solo (AES) returns, as a blocking check.

EIOPA’s own words and formula

The plain words above are EIOPA’s own, word for word, from its list of validations.

Show the formulaShow

EIOPA's formula. Cells are written as {t: table, r: row, c: column}.

if not(isNull({t: S.04.04.01.01, r: R0020, c: C0010, z: Z0001})) or not(isNull({t: S.04.05.01.01, r: R0020, c: C0010, z: Z0001})) then not(isNull({t: S.04.03.01.01, c: C0020})) else true()

Every Solvency II rule on S.04.03

Checks like this one, run at the point of submission, are the first step to real-time supervision. Line4 builds SupTech software for financial regulators that runs checks like these as each return arrives.