No operator of any vehicle shall park or leave standing such vehicle for a longer period than one hour between the hours of nine a.m. and six p.m. of any day except Sundays and holidays, on any street or any part of any street of the City which has been defined or designated by the Council as a one-hour parking area, which areas have been indicated by placing and maintaining green paint or other green material upon the curb surface within the area so designated by the Superintendent of Streets. Such curb surfaces now have and there shall be maintained upon them the following words in white or aluminum colored letters: "PARKING LIMIT 1 HOUR 9:00 A.M. TO 6:00 P.M." (Ord. 1685 § 1; March 13, 1962.)