# FX-SCH-A-000079

Source: https://xmlvalid.com/rules/FX-SCH-A-000079

> Each Seller tax representative party (BG-11) shall have a Seller tax representative VAT identifier (BT-63).

- Level: error
- Rule sets: Factur-X BASIC rules 1.09
- Context: `//ram:SellerTaxRepresentativeTradeParty`
- Test: `(ram:SpecifiedTaxRegistration/ram:ID[@schemeID='VA']!='')`

Validate a document against these rules: https://xmlvalid.com/validate