How second door in front of the cockpit will work?

The video shows an example of what the second door in front of the cockpit will look like.

I think many have heard that in 2025 a new safety rule came into effect in the USA. Now all new passenger airplanes delivered to US airlines must be equipped with a second physical barrier in front of the cockpit entrance.

This additional door or folding lattice barrier is located immediately behind the main armored door and is designed to prevent unauthorized access to the cockpit at times when the main door is open—for example, when the pilot goes to the restroom or a flight attendant needs to enter with food and drinks.

According to the new requirements, one door must always be closed when the other is open, which physically prevents a breach into the cockpit even during a brief opening of the main door.

So the rule sounds reasonable and logical. I think other countries will follow the USA.

Beautiful airplanes ✈️