# BR-KSA-33

Source: https://xmlvalid.com/rules/BR-KSA-33

> Each invoice must have an invoice counter value (KSA-16).

- Level: error
- Rule sets: ZATCA e-invoicing rules (Saudi Arabia) SDK 3.4.6
- Context: `/ubl:Invoice | /cn:CreditNote`
- Test: `(cac:AdditionalDocumentReference[normalize-space(cbc:ID) = 'ICV'] and (cac:AdditionalDocumentReference/cbc:UUID) != '')`

Validate a document against these rules: https://xmlvalid.com/validate