The Constitution of the Kingdom of Thailand, Buddhist Era 2540 (1997) (Thai: รัฐธรรมนูญแห่งราชอาณาจักรไทย พุทธศักราช ๒๕๔๐; rtgs: Rattha Thammanun Haeng Ratcha Anachak Thai Phuttha Sakkarat Song Phan Ha Roi Si Sip) was a constitution of Thailand enacted on 11 October 1997 to replace the 1991 Constitution and was widely hailed as a landmark in Thai democratic constitutional reform. The Constitution was repealed by the Council for Democratic Reform on 19 September 2006 following a successful military coup and was replaced by the 2006 Constitution on 1 October 2006.