Section 27 of the Thai Consitution ...i guess even a foreigner is a person?
All persons are equal before the law, and shall have rights and liberties and be protected equally under the law. Men and women shall enjoy equal rights. Unjust discrimination against a person on the grounds of differences in origin, race, language, sex, age, disability, physical or health condition, personal status, economic and social standing, religious belief, education, or political view which is not contrary to the provisions of the Constitution or on any other grounds, shall not be permitted.