# BR-NG-11-GST-SG

Source: https://xmlvalid.com/rules/BR-NG-11-GST-SG

> An Invoice that contains a GST breakdown group (BG-23) with a GST category code (BT-118-GST) "NG" shall not contain other GST breakdown groups (BG-23).   

- Level: error
- Rule sets: PINT SG rules (Singapore) 1.4.1
- Context: `/ubl:Invoice | /cn:CreditNote`
- Test: `(exists(cac:TaxTotal/cac:TaxSubtotal/cac:TaxCategory[cac:TaxScheme/normalize-space(upper-case(cbc:ID))='GST']/cbc:ID[normalize-space(.) = 'NG']) and count(cac:TaxTotal/cac:TaxSubtotal/cac:TaxCategory[normalize-space(cbc:ID) != 'NG'][cac:TaxScheme/normalize-space(upper-case(cbc:ID))='GST']) = 0) or not(cac:TaxTotal/cac:TaxSubtotal/cac:TaxCategory[cac:TaxScheme/normalize-space(upper-case(cbc:ID))='GST']/cbc:ID[normalize-space(.) = 'NG'])`

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