Request of "on arrival VISA " to my husband who is accompanying me ?

Sir, I am DR.Chitra, Associate professor of physics, have been invited to deliver a lecture in the forthcoming 3rd BITs world congress on advanced Materialsfrom June6-9, 2014. My husband Mr.Goura Krishna Das wants to accompany me. I got mine. But there is delay in the renewal of his passport.. Can we apply "VOA" for my husband as he will get his passport after two days. our date of journey is 3rd June,2014 .
Kindly answer me soon.