I don't know how this is possible. Thailand was the first nation in Asia to explicitly ban Bitcoin altogether. That ban still stands as of now. Something smells fishy about this exchange.
Your information is about 5 months out of date.
The latest policy is a boilerplate warning; inline with what other countries have issues; basically saying consumers use bitcoin at their own risk and warning that the value could drop at any time:
http://www.nationmultimedia.com/business/Bitcoin-virtual-currency-sparks-BOT-warning-30229523.htmlThe coindesk article is slightly inaccurate because we have already been operating OTC trading since Feburary. But we have now launched a new full exchange website also.