CII-SR-472
This id stands for 2 different rules, one per rule set below: Factur-X numbers its rules in each profile separately.
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.
CategoryTradeTax shall occur at most once in a Specified Trade Allowance Charge.
//ram:SpecifiedTradeAllowanceCharge
count(ram:CategoryTradeTax) <= 1
Checked with EN 16931 Invoice (CII)
Each Specified Trade Allowance Charge (BG-20)(BG-21) should contain a VAT rate (BT-96).
//ram:SpecifiedTradeAllowanceCharge
count(ram:CategoryTradeTax) <= 1
Checked with France e-invoice (CII), XRechnung 3.0 Invoice (CII)
Each Specified Trade Allowance Charge (BG-20)(BG-21) should contain a VAT rate (BT-96).
//ram:SpecifiedTradeAllowanceCharge
count(ram:RateApplicablePercent) <= 1
Checked with France Factur-X BASIC WL, Factur-X / ZUGFeRD BASIC WL