Section 21351.3 Of Article 1. Erection And Maintenance From California Vehicle Code >> Division 11. >> Chapter 2. >> Article 1.
21351.3
. Local authorities in their respective jurisdictions may
place and maintain, or cause to be placed and maintained, speed
limit, speed advisory, and mileage signs, or suitable plates affixed
to or near existing signs, which indicate speeds and distances both
in common standards of measures, as specified in Section 12302 of the
Business and Professions Code, and in measures of the metric system
authorized by Congress.