Cal. Bus. & Prof. Code § 5274
(a) None of the provisions of this chapter, except those in Article 4 (commencing with Section 5300), Sections 5400 to 5404, inclusive, and subdivision (d) of Section 5405, apply to an on-premises advertising display that is visible from an interstate or primary highway and located within a business center, if the display is placed and maintained pursuant to Chapter 2.5 (commencing with Section 5490) and meets all of the following conditions: