Incoporation of a pvt ltd company by foreign directors

Hello,

I'm in the process of incoporating a private limited company with its regd office in Mumbai. Both the directors and all the shareholders are from UK.

I've now learnt that since the directors are foreign based, they're required to obtain RBI approval. Can someone please shed some light on this. How do we get this approval? Is there a prescribed form for the same? Can it be done electronically or does it have to be submitted physically?