Dear Khun Narissara / Khun Tiyanan
Our auditor Khun Sornchai also got consult from Acharn Suthep Pongpitak (Executive level from Revenue Dept.)
of Chulalong korn’s radio online date 1st Oct 2014 time about 8.30 ( see link to listen the conversation below)
http://www.curadio.chula.ac.th/Radio-Online/Radio-Demand.php
It’s clear for exempt VAT 0% for selling service to FZ.
Any further inquiries please let me know.