RF and Tatarstan delegation of authorities

How Tatarstan succeeded to be an exclusive region in terms of its’ authorities? How do you think what factors were dominating in this case: subjective or objective (name them)? Give your evaluation of the validity of it. Here we can see some objective and subjective factors, which result to become Tatarstan an exclusive region in Russia. The key factor is the agreement between Russia and Tatarstan in February of 1994. Russia doesn’t depend on Tatarstan and Tatarstan too.