In the same article qoute Prayut:
On Thursday, Prayuth asked farmers to stop burning agricultural waste altogether after imposing a three-month ban on burning it last month.
“Please, I don’t want to use the laws. If it’s used, you all will be breaking it. I don’t want anyone to be in trouble, but you must think about the quality of life of others and their health too,” he said.
He knows he can't use the laws because then he has to address the big money in Thailand and they will kick him out if he does so.