I know, but getting a Z marking means it's going to be positioned near the border possibly as a visual deterrent to other smaller NATO countries.
A visual deterrent, no, they have ‘shared’ satellite and aerial intelligence. It will only serve Russian’s perceived enemies more targets to strike, the only reason Russia would have an interest to move nuclear assets to and within Ukraine is with the intention to establish missile bases like they did within Crimea, this being said, to also remind those who like to pick on NATO’s ‘newly’ established missile bases. All these nations, all-inclusive, like to bargain with their striking capabilities.
Russia had a lot to say about the anti-ballistic base established in Romania some years ago. You see, this particular site which can launch anti-ballistic missiles is also capable to launch ballistic missiles, though I have no idea about the perimeters and which nuclear ordnance it can accommodate. Russia, though, believes it is a threat to their sovereignty.
Come to think about all this... the UN is very anti-productive.