BR-KSA-76
An Invoice line (BG-25) where the Prepayment VAT category code (KSA-33) is "Zero rated" the Prepayment VAT rate (KSA-34) shall be 0 (zero).
What the rule checks
As the rule set's publisher wrote it. The rule runs on every element the context matches, and fails where the test is false; the validator reports the line of that element.
/ubl:Invoice/cac:InvoiceLine/cac:DocumentReference/cbc:DocumentTypeCode
/ubl:Invoice/cac:InvoiceLine/cac:TaxTotal/cac:TaxSubtotal/cac:TaxCategory/cac:TaxCategory /cbc:Percent
Checked with Saudi Arabia ZATCA Tax Invoice (UBL), Saudi Arabia ZATCA Simplified Tax Invoice (UBL)