CF407
Enter valid TTX registration number - …: letters, digits and dashes only, or NA.
error: the document is invalid
What the rule checks
As the rule set's publisher wrote it. The rule runs on every element the context matches, and fails where the test is false; the validator reports the line of that element.
Context
/*/cac:AccountingSupplierParty/cac:Party | /*/cac:AccountingCustomerParty/cac:Party
Test
every $t in $ttx satisfies matches(normalize-space($t), '^(NA|[A-Za-z0-9-]+)$')
Checked with MyInvois e-Invoice