# PEPPOL-T114-R027

Source: https://xmlvalid.com/rules/PEPPOL-T114-R027

> The Item gross price MUST NOT be negative.

- Level: error
- Rule sets: Peppol Order Change rules 3.2
- Context: `cac:Price`
- Test: `(cac:AllowanceCharge/cbc:BaseAmount) >= 0 or not(exists(cac:AllowanceCharge/cbc:BaseAmount))`

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