ibr-052
Each Additional supporting document (ibg-24) MUST contain a Supporting document reference (ibt-122).
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.
cac:AdditionalDocumentReference
(normalize-space(cbc:ID)) != ''
Checked with PINT SG Invoice, PINT SG Credit Note, PINT JP Invoice, PINT A-NZ Invoice, PINT A-NZ Credit Note, PINT MY Invoice, PINT MY Credit Note