(a)   No person shall sell or offer for sale, barter, exchange or solicit the purchase or gift of any goods, wares, merchandise or other articles of value, or offer services for hire within the Village in any area in which an authorized public exhibition is being held except as authorized by the exhibition permit holder.
   (b)   No person licensed pursuant to this chapter shall have any exclusive right to any location in the public streets, nor shall he be permitted a stationary location, nor shall he be permitted to operate in any congested area where his operations impede and inconvenience the public.