California Code, Vehicle Code - VEH § 23123

(a) A person shall not drive a motor vehicle while using a wireless telephone unless that telephone is specifically designed and configured to allow hands-free listening and talking, and is used in that manner while driving.

(b) A violation of this section is an infraction punishable by a base fine of twenty dollars ($20) for a first offense and fifty dollars ($50) for each subsequent offense.

(c) This section does not apply to a person using a wireless telephone for emergency purposes, including, but not limited to, an emergency call to a law enforcement agency, health care provider, fire department, or other emergency services agency or entity.

(d) This section does not apply to an emergency services professional using a wireless telephone while operating an authorized emergency vehicle, as defined in Section 165, in the course and scope of his or her duties.

(e) This section does not apply to a person driving a schoolbus or transit vehicle that is subject to Section 23125.

(f) This section does not apply to a person while driving a motor vehicle on private property.

(g) This section shall become operative on July 1, 2011.