# CII-SR-462

Source: https://xmlvalid.com/rules/CII-SR-462

> Only one DueDateTypeCode shall be present

- Level: error
- Rule sets: EN 16931 rules (CII) 1.3.17, EN 16931 rules 1.3.16 (CII), EXTENDED-CTC-FR rules (CII) 1.4.0.04
- Context: `/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeSettlement`
- Test: `count(//ram:ApplicableTradeTax/ram:DueDateTypeCode) = 0 or count(distinct-values(//ram:ApplicableTradeTax/ram:DueDateTypeCode)) = 1`

Validate a document against these rules: https://xmlvalid.com/validate