# DT-CIUS-PT-177

Source: https://xmlvalid.com/rules/DT-CIUS-PT-177

> The Item price base quantity (BT-149) shall be greater than zero.

- Level: error
- Rule sets: CIUS-PT rules (Portugal, UBL) 2.1.1
- Context: `cac:InvoiceLine | cac:CreditNoteLine`
- Test: `((cac:Price/cbc:BaseQuantity) > 0) or not(exists(cac:Price/cbc:BaseQuantity))`

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