California Codes, Business and Professions Code - BPC, Division 3 — Professions and Vocations Generally, Chapter 2 — Advertisers, Article 1 — General Provisions, Section 5221
“Sign” refers to any card, cloth, paper, metal, painted or wooden sign of any character placed for outdoor advertising purposes on or to the ground or any tree, wall, bush, rock, fence, building, structure or thing, either privately or publicly owned, other than an advertising structure.
“Sign” does not include any of the following:
(a) Official notices issued by any court or public body or officer.
(b) Notices posted by any public officer in performance of a public duty or by any person in giving any legal notice.
(c) Directional warning or information signs or structures required by or authorized by law or by federal, state or county authority.
(d) A sign erected near a city or county boundary that contains the name of that city or county and the names of, or any other information regarding, civic, fraternal, or religious organizations located within that city or county.
Notes
Defines sign as outdoor-advertising material of any character placed on or to land or any natural or built object, other than an advertising structure. Excludes official court or public-body notices, public-officer and legal notices, legally required or authorized directional, warning, or information signs or structures, and boundary signs identifying a city or county and local civic, fraternal, or religious organizations.
Use as reference
Lexinter.net | California Code, Business and Professions Code - BPC § 5221 | https://laws.lexinter.net/codes/california/business-and-professions-code/division-3/chapter-2/article-1/section-5221