Dated events associated with this case. Each event is a shared record: the same event appears identically wherever it is relevant.
· Referendum or popular consultation
Voters approved a sovereign status for Tatarstan following the dissolution of the Soviet Union.
Significance here: Provided the popular mandate behind Tatarstan's 1992 constitution and its subsequent negotiations with Moscow over a power-sharing treaty.
· Agreement
A bilateral treaty gave Tatarstan substantial autonomy within the Russian Federation, later renewed in 2007 and allowed to lapse in 2017.
Significance here: The central legal instrument of Tatarstan's special status within Russia, whose 2017 expiry marked the effective end of that status.
· Administrative change
Tatarstan renamed its head of state from "President" to "Rais," ending the last use of that title by a Russian regional leader.
Significance here: The final symbolic marker of Tatarstan's loss of special status, ending a distinction the republic had held since the 1990s.
Dates show their real precision. Approximate or uncertain dates are labelled and never converted into an exact day.