Line4

1 min readBlockingBank of England taxonomy 2.2.0Updated 11 November 2026

"Use of simplifications" (IR.33.01.04.01 C0160, not a template of this return) does not follow the required pattern: values from 1 to 18 (IR.33.01, Bank of England rule IR_bv1684)

A blocking check on the insurance and reinsurance individual requirements template (IR.33.01), in the quarterly solo (QRS), quarterly group (QRG), annual solo (ARS), annual group (ARG) and annual third-country branch (ARB) returns.

Check your file for this ruleWhat to do if it fails

The rule in plain words

"Use of simplifications" (IR.33.01.04.01 C0160, not a template of this return) does not follow the required pattern: values from 1 to 18

What to do if your return fails it

  1. 01Open the table below and find the cells the rule reads.
  2. 02Compare the code or text in your return with the format the rule sets out, character by character, including any prefix and any spaces.
  3. 03This is a blocking check. A return that fails it is normally rejected, so fix it before you submit.

The cells it reads

Insurance and reinsurance individual requirements (IR.33.01.04.01)

Column

  • C0160Use of simplifications

Which returns it applies to

Line4 Check runs it on quarterly solo (QRS), quarterly group (QRG), annual solo (ARS), annual group (ARG) and annual third-country branch (ARB) returns on Bank of England taxonomy 2.2.0. The Bank of England applies it to quarterly solo (QRS), annual third-country branch (ARB), annual solo (ARS), quarterly group (QRG) and annual group (ARG) returns, as a blocking check.

The Bank’s own words and formula

In the Bank of England’s list of validations, word for word:

si1370 doesn't follow imposed pattern: values from 1 to 18.
Show the formulaShow

The Bank of England's formula. Cells are written as {t: table, r: row, c: column}.

matches($v0, "^(1$|1,){0,1}(2$|2,){0,1}(3$|3,){0,1}(4$|4,){0,1}(5$|5,){0,1}(6$|6,){0,1}(7$|7,){0,1}(8$|8,){0,1}(9$|9,){0,1}(10$|10,){0,1}(11$|11,){0,1}(12$|12,){0,1}(13$|13,){0,1}(14$|14,){0,1}(15$|15,){0,1}(16$|16,){0,1}(17$|17,){0,1}(18$|18,){0,1}$")

Every Solvency UK rule on IR.33.01

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.