A. The traffic engineer is authorized, subject to the provisions and limitations of this title, to place, and when required herein shall place the following curb markings to indicate parking or standing regulations, and said curb markings shall have the meaning herein set forth.
1. Red shall mean no stopping, standing or parking at any time except as permitted by the Vehicle Code and except that a bus may stop in a red zone marked or signed as a bus zone.
2. Yellow shall mean no stopping, standing or parking at any time between seven o'clock (7:00) A.M. and six o'clock (6:00) P.M. of any day except Sundays and holidays for any purpose other than the loading or unloading of passengers or materials, provided that the loading or unloading of passengers shall not consume more than three (3) minutes nor the loading or unloading of materials more than twenty (20) minutes.
3. White shall mean no stopping, standing or parking for any purpose other than loading or unloading of passengers which shall not exceed three (3) minutes and such restrictions shall apply between seven o'clock (7:00) A.M. and six o'clock (6:00) P.M. of any days except Sundays and holidays and except as follows:
a. When such zone is in front of a hotel the restrictions shall apply at all times.
b. When such zone is in front of a theater the restrictions shall apply at all times except when such theater is closed.
4. Green shall mean no standing or parking for longer than such time as shall be indicated by sign or lettering on the curb at any time between such hours as shall be indicated by signs or curb markings.
B. When there are no curbs, the traffic engineer shall indicate the parking or standing regulations by installing in lieu of curb markings appropriate signs giving notice of such regulations. (Prior code § 67805)