I have been in and out of Utapao few times on international flights, never had a problem although I have been on non imm visa, one thing that you will see though is all your luggage will be scanned before you exit into the arrivals terminal. Being a military airport they are more strict about what comes in and I have seen many ppl open up their cases for officials. Visa wise though it’s usually quick and trouble free.
David Broadfoot just to clarify because I’m confused now, yes I was referring to the TM30 process of changing my address. So am I going to use a TM30 to do that or a TM28?
The school will have to be listed in the work permit. You can work at a second job (school) but if switching from one to another you will need to take documents from the old school to immigration. Others should be able to clarify further