Message

[BR-56]-Each Seller tax representative party (BG-11) shall have a Seller tax representative VAT identifier (BT-63).

Context
cac:TaxRepresentativeParty
Test
exists(cac:PartyTaxScheme[cac:TaxScheme/(normalize-space(upper-case(cbc:ID)) = 'VAT')]/cbc:CompanyID)
Usage
/ ubl:Invoice / cac:TaxRepresentativeParty / cac:PartyTaxScheme / cbc:CompanyID