# FX-SCH-A-000182

Source: https://xmlvalid.com/rules/FX-SCH-A-000182

> Each Preceding Invoice reference (BG-3) shall contain a Preceding Invoice reference (BT-25).

- Level: error
- Rule sets: Factur-X BASIC rules 1.09
- Context: `/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeSettlement/ram:InvoiceReferencedDocument`
- Test: `(ram:IssuerAssignedID!='')`

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