Dear Dharma
1. The rules are generally framed by the institute which are mentioned in the SAC constitution. sorry i didn't the 3rd que....which discussion process are you referring to ? hostel level or institute level ?
for all the other cases/exception/etc like the example you have mentioned, these are forwarded to hostel warden's notice and his decision will be final.
2. Rajat sharma Msc 2nd yr biotech. student is UG, Msc 2years students are considered to be UGs in the institute. You might have got a mail previously from Mr. Devendra proposing 3 cadidates as election officers. After that warden has declared them as election officers.