unitCodes falsley fallged as not allowed

[ghost]

The unitCode BB gets flagged as not allowed, but is allowed according to the documentation.
FeRD includes in the current ZUGFeRD-Standard the Document EN16931 code lists values v8 - used from 2021-09-06.xlsx which is located in /zugferd22de.zip/DE/Dokumentation/. In that Excel are following Documents listed on row 24 UN/ECE Recommendation N°20 and UN/ECE Recommendation N°21 — Unit codes.
These documents can be found here:

• UN/ECE Recommendation N°20
• UN/ECE Recommendation N°21

The corresponding error message: <error type="4" location="/*[local-name()='CrossIndustryInvoice']/*[local-name()='SupplyChainTradeTransaction']/*[local-name()='IncludedSupplyChainTradeLineItem'][31]/*[local-name()='SpecifiedLineTradeDelivery']/*[local-name()='BilledQuantity']" criterion="document('FACTUR-X_EXTENDED_codedb.xml')//cl[@id=9]/enumeration[@value=$codeValue9]">Value of '@unitCode' is not allowed. from /xslt/ZF_221/FACTUR-X_EXTENDED.xslt)</error>

[jstaerk]

which documentation? on https://ec.europa.eu/digital-building-blocks/wikis/display/DIGITAL/Registry+of+supporting+artefacts+to+implement+EN16931 in – Full listing of the code lists as used in EN16931 - version 11.0 Sheet "Unit" I do indeed find BB (Base Box) but no FLA?

[ghost]

I edited the issue, you are right I can't find FLA either only BB. Sorry for that.