- 24 February 1997 Suthee Singhasaneh 26 January 1993 - 17 June 2002 Panas Simasathien 16 March 1994 - 3 July 2006 Viroj Nualkhair 15 January 1997 - 15 February 2005 Vuthichai Pongprasit 25
- 24 February 1997 Suthee Singhasaneh 26 January 1993 - 17 June 2002 Panas Simasathien 16 March 1994 - 3 July 2006 Viroj Nualkhair 15 January 1997 - 15 February 2005 Vuthichai Pongprasit 25