SEZ is applicable for state legislature

Dear Friends,

Here i just want to know, Company in which am i working now is working for a customer who is in SEZ Zone, and getting exemptions for Excise and service Tax.

  But here the question is if a specified place is declared as SEZ Zone under central act, can i get an exemption for state taxes also i.e VAT etc also.

  One advocate who is familiar to me clarified that, a location which is declared as SEZ ZOne , under state acts will not get an exemption for the applicable taxes.

Please clarify me in this regard along with notification nos, circulars if any.

Regards,

madhu