There are 3 different dates 2014-2017-2019 .
Prayut will for sure Argue in court that he started officially in 2019.
However, the start date of the eight-year limit remains a key legal question. Is it when Prayut assumed his post in 2014, when the current Constitution came into force on April 6, 2017, or when Prayut was appointed by royal command as PM on June 9, 2019, after the general election in March that year.