# BR-NG-01-GST-SG

Source: https://xmlvalid.com/rules/BR-NG-01-GST-SG

> An Invoice that contains an Invoice line (BG-25), a Document level allowance (BG-20) or a Document level charge (BG-21) where the GST category code (BT-151-GST, BT-95-GST or BT-102-GST) is "NG" shall contain exactly one GST breakdown group (BG-23) with the GST category code (BT-118) equal to "NG".

- Level: error
- Rule sets: PINT SG rules (Singapore) 1.4.1
- Context: `/ubl:Invoice | /cn:CreditNote`
- Test: `((exists(//cac:TaxCategory[cac:TaxScheme/normalize-space(upper-case(cbc:ID))='GST']/cbc:ID[normalize-space(.) = 'NG']) or exists(//cac:ClassifiedTaxCategory[cac:TaxScheme/normalize-space(upper-case(cbc:ID))='GST']/cbc:ID[normalize-space(.) = 'NG'])) and (count(cac:TaxTotal/cac:TaxSubtotal/cac:TaxCategory[cac:TaxScheme/normalize-space(upper-case(cbc:ID))='GST']/cbc:ID[normalize-space(.) = 'NG']) = 1)) or (not(//cac:TaxCategory[cac:TaxScheme/normalize-space(upper-case(cbc:ID))='GST']/cbc:ID[normalize-space(.) = 'NG']) and not(//cac:ClassifiedTaxCategory[cac:TaxScheme/normalize-space(upper-case(cbc:ID))='GST']/cbc:ID[normalize-space(.) = 'NG']))`

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