In each parking facility of fifty (50) or more spaces, a minimum of twenty-five percent (25%) and a maximum of forty percent (40%) of the spaces may be designed and reserved for small or compact cars. Spaces for compact vehicles shall be located in a manner affording desirability and usability equivalent to standard spaces. Compact parking spaces shall be located in groups of not less than five (5) contiguous spaces, and shall be identified by appropriate directions and marking.