# UBL-SR-43-GST-SG

Source: https://xmlvalid.com/rules/UBL-SR-43-GST-SG

> AdditionalDocumentReference/DocumentTypeCode shall only be used for invoiced object (code 130), project reference in CreditNote (code 50) or total amounts including or excluding GST in SGD (code sgdtotal-incl-gst or sgdtotal-excl-gst)

- Level: error
- Rule sets: PINT SG rules (Singapore) 1.4.1
- Context: `cac:AdditionalDocumentReference[cbc:DocumentTypeCode]`
- Test: `((cbc:DocumentTypeCode='130' or cbc:DocumentTypeCode='sgdtotal-incl-gst' or cbc:DocumentTypeCode='sgdtotal-excl-gst') or ((local-name(/*) = 'CreditNote') and (cbc:DocumentTypeCode='50')))`

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