BR-KSA-84
The Document level allowance VAT rate (BT-96), Document level Charge VAT rate (BT-103), VAT category rate(BT-119), Invoiced item VAT rate (BT-152), Prepayment VAT rate(KSA-34) must be limited to one of the following values (5 or 15) when the relevant Document level allowance VAT category code (BT-95), Document level Charge VAT category code(BT-102), VAT category code(BT-118), Invoiced item VAT category code(BT-151), Prepayment VAT Category Code (KSA-33) is "S"- "Standard rated". In other words, for Standard Rate VAT Category the rate can either be 15% or 5%.
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.
not(floor(number(/ubl:Invoice/cac:AllowanceCharge/cac:TaxCategory/cbc:Percent)) = 15 or floor(number(/ubl:Invoice/cac:AllowanceCharge/cac:TaxCategory/cbc:Percent = 5))) or not(floor(number(/ubl:Invoice/cac:TaxTotal/cac:TaxSubtotal/cac:TaxCategory/cbc:Percent)) = 15 or floor(number(/ubl:Invoice/cac:TaxTotal/cac:TaxSubtotal/cac:TaxCategory/cbc:Percent = 5))) or not(floor(number(/ubl:Invoice/cac:InvoiceLine/cac:Item/cac:ClassifiedTaxCategory/cbc:Percent)) = 15 or floor(number(/ubl:Invoice/cac:InvoiceLine/cac:Item/cac:ClassifiedTaxCategory/cbc:Percent = 5))) or exists(/ubl:Invoice/cac:InvoiceLine/cac:TaxTotal/cac:TaxSubtotal/cac:TaxCategory/cbc:Percent) and not(floor(number(/ubl:Invoice/cac:InvoiceLine/cac:TaxTotal/cac:TaxSubtotal/cac:TaxCategory/cbc:Percent)) = 15 or floor(number(/ubl:Invoice/cac:InvoiceLine/cac:TaxTotal/cac:TaxSubtotal/cac:TaxCategory/cbc:Percent = 5)))
not(ubl:Invoice/cac:AllowanceCharge/cac:TaxCategory/cbc:Percent = '5' or ubl:Invoice/cac:AllowanceCharge/cac:TaxCategory/cbc:Percent = '15')
Checked with Saudi Arabia ZATCA Tax Invoice (UBL), Saudi Arabia ZATCA Simplified Tax Invoice (UBL)