# BR-CL-06-GST-SG

Source: https://xmlvalid.com/rules/BR-CL-06-GST-SG

> Invoice period description code must be according to UNCL 2005 D.16B.

- Level: error
- Rule sets: PINT SG rules (Singapore) 1.4.1
- Context: `cac:InvoicePeriod/cbc:DescriptionCode`
- Test: `((not(contains(normalize-space(.), ' ')) and contains(' 3 35 432 ', concat(' ', normalize-space(.), ' '))))`

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