A regular visit that I have to make to the Phuket Immigration Office. Things change each time I go and there are some pieces of paper which I must fill in but it is running smoothly. I remember my papers and always wai before I sit down.
Then I saw the sign above and wondered where I had seen something similar and it is to some of the Temples for respect. Which I entirely understand and this is a Government building so I would assume that you would also dress correctly.
Then a guy walks up to someone else for a pen and he has no shoes on and is wearing a dirty vest - no comment.