# BR-12

Source: https://xmlvalid.com/rules/BR-12

> An Invoice shall have the Sum of Invoice line net amount (BT-106).

- Level: error
- Rule sets: EN 16931 rules (UBL) 1.3.17, EN 16931 rules 1.3.16 (UBL), EXTENDED-CTC-FR rules (UBL) 1.4.0.04, Romanian RO e-Factura rules (UBL) 1.0.9
- Context: `cac:LegalMonetaryTotal`
- Test: `exists(cbc:LineExtensionAmount)`

> An Invoice shall have the Sum of Invoice line net amount (BT-106).

- Level: error
- Rule sets: EN 16931 rules (CII) 1.3.17, EN 16931 rules 1.3.16 (CII), EXTENDED-CTC-FR rules (CII) 1.4.0.04, Factur-X BASIC WL rules 1.09, Factur-X EN 16931 rules 1.09.2, Factur-X EXTENDED rules 1.09.2
- Context: `//ram:SpecifiedTradeSettlementHeaderMonetarySummation`
- Test: `(ram:LineTotalAmount)`

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