Classify documents

Classify documents

Hi, we are implementing ISO 27001 and need to classify documents, for example "internal", "public" and so on. Is there a way to show the classification of a document in the document itself? Maybe with a dropdown? The editor uses a dropdown to specify which classification the document has. The reader sees the classification. Is that possible?
And the next question (which is related): For example, if a document is classified as "secret", it cannot be printed or downloaded.
So there must be a logic ("if" "then")
Thanks!