Claim: The top three teams Raj Pracha Nonthaburi, Chiangrai United, and Nara United in the 2009 Regional League Division 2 were promoted to the 2010 Thai Division 1 League, the feeder league for the Thai Premier League.
Evidence: 1 2 Chiangrai United 3 Nara United Promotion to 2010 Division 1 It is the feeder league for the Thai Premier League.