CII-DT-052
ExemptionReasonCode should not be present
warning: reported, still valid
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
//ram:*[ends-with(name(), 'TradeTax')]
Test
not(ram:ExemptionReasonCode) or self::ram:ApplicableTradeTax
Checked with EN 16931 Invoice (CII)