From John Legend to local favorites not all food trucks operate the same.
Singing legend John Legend and his wife Chrissy Teigen hired a couple food trucks to fuel some protesters in New York.
Some vendors include all food preparation and cooking inside the truck.
Others use kitchen commissaries to partially prepare food.
Rules and regulations are strict regarding food trucks.
But, rules vary from location to location.
They may dictate where food can be cooked, availability of fresh water, and proximity of rest rooms.