Refund of fees for advance itt

Hello, I urgently require assitance regarding the following matter

My junior has registered for Advance ITT. However due a accident in his family he will not be able to attend the same. I would like to know the procedure for cancellation/postponement of his advance ITT.Also Whether his fee is refundable or is it going to be completely withheld as cancellation fee. 

Thanking You,