Message

Only one tax total with tax subtotals MUST be provided.

Context
ubl-creditnote:CreditNote | ubl-invoice:Invoice
Test
count(cac:TaxTotal[cac:TaxSubtotal]) = 1
Usage
/ ubl:Invoice / cac:TaxTotal / cac:TaxSubtotal
/ ubl:CreditNote / cac:TaxTotal / cac:TaxSubtotal