Update: We added the missing link.
Thailand’s elite and the elite’s regimes keep many secrets. According to Freedom of Information Around the World 2006 (clicking downloads a 200-page PDF) the best kept secrets are royal secrets:
Information that “may jeopardize the Royal Institution” cannot be disclosed. There are discretionary exemptions for information that would: jeopardize national security, international relations or national economic or financial security; cause the decline of the efficiency of law enforcement; disclose opinions and advice given internally; endanger the life or safety of any person; disclose medical or personal information which would unreasonably encroach upon the right of privacy; disclose information protected by law or given by a person in confidence; other cases prescribed by Royal Decree. Information relating to the Royal Institution is to be kept secret for 75 years. Other information should be disclosed after 20 years which may be extended in five years periods (p. 147).
Reading this assessment, we can only ponder just how deep and dark are the secrets of the royal family.