Spaces on urban county streets in the vicinity of the Courthouse, with the exception of that space which is prohibited to parking by other sections of these regulations, may be designated and set apart as vehicle parking spaces for urban county government officials and employees. The director, division of traffic engineering shall designate the assignment of such spaces, which shall be indicated by appropriate markings. It shall be unlawful for any person except the duly designated officials or employees of the urban county government to use or occupy such spaces.