Hi, 

BHU is a central university. Counselling for IMS BHU is conducted by DGHS on behalf of MCC. The counselling is held along with the 15% AIQ counselling for participating central universities as well as the deemed universities.

So if you want to apply for IMS BHU you need to participate in the 15% AIQ counselling.

As far as state counselling is considered, its conducted by the respective state body. And it doesnt depend on AIQ counselling as long as you haven't been alloted a seat.Applying for only state counselling doesnt necessitate your registration for AIQ counselling. However since you also want to try for IMS, you need to attend the AIQ counselling. 

Hope it helps 

All the best.