[3] After spending many years in the public sector, he joined the government in 1994 as Deputy Minister of Finance, his tenure lasted till 1997.

Either the House of Representatives of Thailand had to confirm him as the new Prime Minister, or the new political grouping must vote for a new leader and submit his name for approval.

[4] There has been some questions - even a letter submitted to the Constitutional Court by Senators - concerning the legality of his temporary appointment as Prime Minister (even in a caretaker capacity).

He was appointed Minister of Interior of Thailand in the Abhisit cabinet, a post which he held until the government's electoral defeat in 2011.

On 14 February 2009, Chavarat became the leader of the Bhumjai Thai Party until 4 September 2012, in which he was succeeded by his son, Anutin Charnvirakul.