It's not obvious to me. The clue is in the titles of the police orders "xxx/2557" means they came into force in 2014. They are thoroughly in the public domain and easily found online:
http://www.pcecnews.com/permNL/Immig...tions%20en.pdf
https://www.immigration.go.th/downlo...7131155427.pdf
What is more 138/2557 does not set out any requirements at all. It cancels previous police orders rendered obsolete by 327/2557 and nothing else. 327/2557 is the one that specifies the requirements