Tainyi,
There are several points for consideration in a complex scenario such as this. I have not read the terms of the lease, although it doesn't sound dissimilar to some country estate leases I am aware of which permit freedom of use/ never ownership. If the Government pays for works on St Basil's Catheral, does that mean they own it or they are donating funds in support of the church - a recognised self governing entity?
Do the faberge eggs TNII gave as Easter presents to his wife and children belong to the Russian Federation because the Soviet Union claimed all his known personal assets /state purses as their own ? Does that in turn make anyone who has ever bought a Faberge egg, or piece of imperial jewellery through a Sotheby's auction or off a friend or relative, a thief of the Russian Federation ...? I say these things to highlight the Pandora's box which has plagued Russia in all its forms since the 1917 revolution.
In respect of the original intent of this thread which I believe richard_1990 was highlighting what he thought evidentiary proof of legal continuity between Russian Empire/ USSR /Russian Federation, perhaps we should look for other similiar examples, Greece or Iran may provide insights not yet considered.
Kind Regards,
SOH