There is a newer version of the California Code
2011 California Code
Vehicle Code
DIVISION 12. EQUIPMENT OF VEHICLES [24000 - 28150]
ARTICLE 1. Horns, Sirens and Amplification Devices
Section 27001
CA Veh Code § 27001 (through 2012 Leg Sess) What's This?
(a) The driver of a motor vehicle when reasonably necessary to insure safe operation shall give audible warning with his horn.
(b) The horn shall not otherwise be used, except as a theft alarm system which operates as specified in Article 13 (commencing with Section 28085) of this chapter.
(Amended by Stats. 1977, Ch. 993.)
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