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UBL-SR-13

Message

Seller tax registration shall occur maximum once

Context
/ubl:Invoice | /cn:CreditNote
Test
(count(cac:AccountingSupplierParty/cac:Party/cac:PartyTaxScheme[cac:TaxScheme/upper-case(cbc:ID)!='VAT']/cbc:CompanyID) <= 1)