Any person coming into the City in a motor vehicle may transport in the fuel tank of such vehicle motor vehicle fuel for their own use only and for the purpose of operating the motor vehicle without securing a license or paying the tax provided in this chapter, or complying with any of the provisions imposed upon dealers herein, but if the motor vehicle fuel so brought into the City is removed from the fuel tank of the vehicle or used for any purpose other than the propulsion of the vehicle, the person so importing the fuel into the City shall be subject to all provisions herein applying to dealers.