NFE-732
Rejeição: CFOP de operação interestadual e idDest <> 2 [nItem: …] (CFOP …, idDest …).
In English An interstate CFOP (starting with 2 or 6) needs idDest 2.
What the rule checks
As the rule set's publisher wrote it. The rule runs on every element the context matches, and fails where the test is false; the validator reports the line of that element.
nfe:infNFe/nfe:det
not($c1 = ('2', '6')) or $idDest = '2'
Checked with NF-e 4.00, NF-e 4.00 with authorisation protocol