Code for TaxScheme. VAT is the only legal value.

Cardinality
1..1
Namespace
cbc urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2
Example value
VAT
Rules
Identifier/Error message Flag
NONAT-T10-R014
Invoice tax schemes MUST be 'VAT'
fatal
NONAT-T10-R017
Every tax scheme MUST be defined through an identifier.
fatal