What do i need to run a NY hot dog stand?!

i am purchasing a couple of hot dog/burger vending cart here in new york what info and where can i fin the info needed to do this in the proper and legit way with health department, tax id, and dba certificates any info in this field would be appreciated !. also wondering about insurances and so on whether they will be needed or not !. thanks jimWww@FoodAQ@Com

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