The directive itself doesn't solve your problem. DocTag reliably ensures the classification of all the documents.
In one of the biggest breweries, the confidential documents were not labelled, even though there was an internal instruction for handling information among the employees. Based on our longterm experience, we know that the effectiveness of training is generally short-term. That's why we proposed the DocTag application, which we incorporated into the office packet MS Office being used in the company.
The DocTag application made the employees classify all the documents according to confidentiality of the contained information. The labeling was visible in the heading of each document. We proposed securing by encryption for the documents of the highest sensitivity.
Since the brewery already had a defined classification system, the DocTag implementation only took several days. The employees' training was indeed the most time-consuming. Due to the application, there are no more documents being created without labeling the class of security. DocTag monitors the changes of the document classification and automatically classifies emails according to their attachments.