> Could you help me understand why you need an interpretation of Indian law in this case? 
> I understood that US Copyright laws would be applicable on Wikimedia Commons as the servers are in the US.

My understanding is that it needs both home (place where the work is first published) and US laws to apply. Had the document been a work of US government (federal), there would be no trouble.

PD-India along with evidence of it being PD in the US would be needed for hosting on Wikimedia Commons.

best wishes
Shyamal