This is the 1267th most frequent Catalan word.
oficials
"Oficials" means "officials" in English.
In this sentence, 'oficials' is an adjective qualifying 'documents', conveying the meaning of something formal or recognized by an authority.
Els documents oficials s'han d'enviar abans de la data límit.
The official documents must be sent before the deadline.
Here, 'oficials' is a noun referring to authorized personnel or officers in a specific organization or institution.
Els oficials de la policia estan investigant el cas.
The police officers are investigating the case.
In this instance, 'oficials' describes 'normes', denoting that these rules are formal and established by an authoritative entity.