# BR-CO-18-GST-SG

Source: https://xmlvalid.com/rules/BR-CO-18-GST-SG

> An Invoice shall at least have one GST Breakdown group (BG-23-GST).

- Level: error
- Rule sets: PINT SG rules (Singapore) 1.4.1
- Context: `/ubl:Invoice | /cn:CreditNote`
- Test: `exists(cac:TaxTotal/cac:TaxSubtotal)`

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