Actually not hard and fast. I went to Imm in Korat with a really good hand drawn map (I'm a draftsman) and it was laughed at and paraded around the office so all could see how laughable it was! A google map was demanded (in fact it didn't even show where the house was. Ridiculous.
Wrong. Medicinal prescription skin ointments I use are not available in Thailand. "Breathe Right" stickies not available in Thailand (useless knock off's from Lazada). Etc.