# NFE-351

Source: https://xmlvalid.com/rules/NFE-351

> Rejeição: Valor do ICMS da Operação no CST=51 difere do produto BC e Alíquota [nItem: …] (vICMSOp …).

- Level: error
- Rule sets: SEFAZ authorisation rules of NF-e 4.00 MOC 7.0 Anexo I, NTs up to 2026.010
- Context: `nfe:infNFe/nfe:det`
- Test: `$cst != '51' or br:product($icms/nfe:vICMSOp, br:dec($icms/nfe:vBC) * br:dec($icms/nfe:pICMS) div 100)`

In English: With ICMS CST 51, vICMSOp is not vBC × pICMS (R$ 0.01 tolerance).

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