At this point it feels like I hear "We will consider X as a declaration of war" from Russia every day or so. It reminds me of the Uno Wild Card. I wonder if they're using it as a catch all for any gaps in their armor?

Can't handle more sanctions? Uno wild card! Don't want anyone supporting the Ukrainian defense effort? Uno wild card! Can't guarantee the security of satellites? Uno wild card!

Rogozin is famous for this kind of talk.

In 2014, after an airplane with him on board was denied entry to Romania due to EU sanctions, he threatened that he will return in a strategic bomber.

https://www.reuters.com/article/us-ukraine-crisis-romania-ru...

He may not be able to declare it, but he can certainly say it. Whether it's truthful or not is another matter. He could be publicly stating policy (in which case his statement would be truthful, but not based on his authority) or blustering (in which case it's false).