For the purposes of this chapter, a “mobile food vendor” means a business that, as its principal function, sells or otherwise dispenses prepared food and non-alcoholic beverages to the general public from a licensed motor vehicle that is not permanently affixed to real property. The term excludes food delivery vehicles and vehicles that dispense food and move from place to place and are stationary for no more than 15 minutes at a time, such as ice cream trucks. The term also excludes food trucks and similar concession vehicles that are licensed by the City under a special event permit.