Can we write Validation rules on Item Attachments.

Is there a way to validate Attachments added on an Item. Say,

1. If Attachment Category is "Public", the attachment type to be selected is to be restricted only to PDF.
2. When user is trying to download a restricted Attachment, it should throw a warning message stating it is "XYZ document, do not modify".
3. When user is trying to add a attachment of category that should not be added it should throw an error message.

Can these type of attachment rules or any other attachment related validations could be done using the standard "Manage Item rule sets"?

If not how can we achieve these?