Those elections mean everything since they 78.55% of Naga's have chosen their elected representatives who take their oath pledging their allegiance to the Constitutions of India.
Same as the PM of India.
Nagaland was part of India from 1881. They never had a legal option to split away from India.
The "referendum" you speak of was a bogus one claimed by NCC in which they claimed 99% support.
This is similar to President Musharaff's "election" in which he got 98 % of all votes in pakistan and made him a global joke. Same election victory was also claimed by Sadam Hussain in which he claimed he got 97% of all votes in Iraq.
LOL...... ok "dragon". Whatever floats your boat.