This can be translated as...
The doors leading to the outside must be sealed and, if possible, close automatically; in case this is not feasible, it is advisable to put clear signs regarding the obligation to keep the doors closed.

Here are some relevant examples that you may consider:
Fire-Rated Doors: Automatically sealed doors are often required to be fire-rated, meaning they can withstand fire for a certain period. These doors automatically seal in the event of a fire to prevent the spread of fire and smoke, protecting egress routes and compartments within the building.

Acoustic Doors: In buildings where sound insulation is crucial, such as theaters, recording studios, or office buildings, automatically sealed doors help maintain the required acoustic environment by preventing the transmission of sound from one area to another.

Air-Tight Doors in Laboratories and Hospitals: In environments that require strict control over air quality and contamination, such as laboratories and hospitals, automatically sealed doors ensure that controlled environments remain isolated from outside contaminants.

Flood Defense Doors: In areas prone to flooding, automatically sealed doors can provide a critical barrier against water ingress, protecting the interior spaces of buildings.
https://www.stormmeister.com/flood-doors-for-homes/

An accessible door with non-visible drive.