Section 328. Defamation by Publication
If the offence of defamation be committed by means of publication of a document, drawing, painting, cinematography film, picture or letters made visible by any means, gramophone record or another recording instruments, recording picture or letters, or by broadcasting or spreading picture, or by propagation by any other means, the offender shall be punished with imprisonment not exceeding two years and fined not exceeding two hundred thousand Baht.
Defamation (Sections 326-333) | Thailand Law Library (siam-legal.com)