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1 min readWarningEIOPA taxonomy 2.10.0Updated 12 November 2026

Basic information and 2 other templates: a check on its values (S.01.02, S.04.03, S.04.04, EIOPA rule BV2537)

A warning on the basic information (S.01.02), basic information - list of underwriting entities (S.04.03) and activity by country- location of underwriting (S.04.04) templates, in the annual solo (ARS) return.

This check can be read two ways. Line4 Check follows the XBRL specification, and the check is proven on worked examples, one where it passes and one where it fails, on which our engines agree.

It is new in taxonomy 2.10.0, for returns from the first quarter of 2027. 2.8.2 returns do not have it.

Check your file for this rule

The rule in plain words

Data relating to Business underwritten in the considered country through FPS, as reported in column C0030 of template S.04.04 for the entity acting as the head office, should not be reported in respect of the country in which that entity is authorised to conduct business (Country of authorisation reported in S.01.02)

The headline gives only the template and the kind of check, because the rule is too long to say in a headline. The plain words above say all of it.

This is a warning. It does not stop the return on its own, but your supervisor may ask you to explain it. It runs only when your filing indicators mark S.01.02, S.04.03 and S.04.04 as reported.

The cells it reads

Basic information (S.01.02.01.01)

Row

  • R0050Country of authorisation

Column

  • C0010Report information

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 and by EEA country (host country for FPS) (S.04.04.01.02)

Row

  • R0020Premiums written (gross)

Column

  • C0030Business underwritten in the considered country through FPS

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 ECB solo (AES) and annual solo (ARS) returns, as a warning.

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}.

{t: S.01.02.01.01, r: R0050, c: C0010} != dim({t: S.04.04.01.02, r: R0020, c: C0030, z: Z0001},[s2c_dim:LA])

Every Solvency II rule on S.01.02

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.