# NFE-524

Source: https://xmlvalid.com/rules/NFE-524

> Rejeição: Chave de Acesso referenciada com Ano-Mês inválido [nOcor: …] (ano … anterior a 06).

- 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:ide/nfe:NFref/nfe:refNFe`
- Test: `br:keyyear($k)`

> Rejeição: Chave de Acesso referenciada com Ano-Mês inválido [nOcor: …] (mês …).

- 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:ide/nfe:NFref/nfe:refNFe`
- Test: `br:keymonth($k)`

> Rejeição: Chave de Acesso referenciada com Ano-Mês inválido [nOcor: …] (CT-e, …).

- 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:ide/nfe:NFref/nfe:refCTe`
- Test: `br:keyyear($k) and br:keymonth($k)`

In English: A referenced key has a year before 2006 or a month outside 01 to 12.

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