Dear Rabb,
Be careful to update documents, ask other peoples in India for the alternate of Birth Certificate, there must be something issue from government authorities (I know a person in this form who provide them a birth certificate which issued from Saudi Government but it was a temporary certificate he send that with attention and wise verse but BIQ send him a rejection letter).
So follow the format they required check your letter there is a link for the format types.
Hope you will get the certificate.
Dear Rabb,
I am born in 1982 and my wife in 1983 (india - Punjab) and we have issued our date of birth certificate in 2013 also my friend and his wife issued there birth certificates in 2013. So i dont think so there is a problem.
Kindly go and consult with lawyer if you face any problem he will guide you confirmly.
Best of Luck