BR-KSA-81
The other Buyer ID (BT-46) must present in the tax invoice and associated debit notes and credit notes (KSA-2, position 1 and 2 = 01), where the buyer VAT registration number or buyer group VAT registration number (BT-48) is not provided.
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.
cac:AccountingCustomerParty/cac:Party/cac:PartyIdentification/cbc:ID
cac:AccountingCustomerParty/cac:Party/cac:PartyIdentification/cbc:ID
Checked with Saudi Arabia ZATCA Tax Invoice (UBL), Saudi Arabia ZATCA Simplified Tax Invoice (UBL)