Official rule text
[ibr-065]-The Item classification identifier (ibt-158) MUST have a Scheme identifier.
What this means
If an item is given a classification code (such as an HS or service-type code), that code must also state which coding scheme it belongs to - a bare code with no scheme is not enough.
What to do
Share this rule id with whoever manages your invoicing software or IT — or ask TechMate to fix it for you (see below).
Check whether your invoice hits this rule — freeCodes & classifications
Whether codes on the invoice — item classification (HS, ISIC), Incoterms, unit codes, document type — are drawn from the exact code list Oman's rules require, not just any plausible value.
Other rules in this category
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