Cal. Code Regs. tit. 4, § 2451
(b) A public or private directional sign, that is in compliance with the provisions of Title 23, CFR, Chapter 1, Part 750.154, in effect April 1, 1995, may be placed next to interstate or a primary highways except that a sign may not be placed in the following locations:
Note: Authority cited: Sections 5250 and 5415, Business and Professions Code. Reference: Sections 5203, 5221, 5440 and 5440.1, Business and Professions Code.
1. Repealer of former section 2451 and renumbering of former section 2452 to section 2451, including amendment of section and new Note, filed 9-20-99; operative 10-20-99 (Register 99, No. 39).