The Russian Duma already voted for the annexation of the occupied territories. The article does not state what would be the legal status of the region. It says that many point of the proposal are secret, but I got the feeling that a non trivial point is glossed over.
It’s one step further even: They already voted for the annexation of territories that they did never occupy. It’s ludicrous. Russia doesn’t know it’s own exact border claims as these were never specified.