# CII-SR-458

Source: https://xmlvalid.com/rules/CII-SR-458

> IssuerAssignedID with TypeCode 130 should exist maximum once

- Level: warning
- Rule sets: EN 16931 rules (CII) 1.3.17, EN 16931 rules 1.3.16 (CII)
- Context: `/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement`
- Test: `( count(ram:AdditionalReferencedDocument[ram:TypeCode='130']) <= 1)`

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