A conditional use may be granted by the municipal agency to permit certain required off-street parking space to be located elsewhere than on the same lot with the use to which it is appurtenant, provided that: all such space, through ownership or permanent easement, shall be under the control of the owner or operator of the use to which such space is appurtenant; such space shall not be in a residential zone and such space shall be not more than 500 feet from the property to be used.