Which Form under TNVAT when supplied to SEZ

Hello everyone,

  My client is the supplier to the companies covered under special economic zones. Since VAT don't apply to SEZ Companies, the client can't collect VAT from them.

My queries are -

- whether he has to obtain any form from SEZ Cos. under TNVAT for claiming exemption of VAT,

- if it so, which form? and if the same has to be submitted to VAT authorities everymonth?

I'm from chennai and TNVAT Act is relevant in this case.

Thanks.