Section 23125 - Use of wireless telephone while driving schoolbus or transit vehicle prohibited(a) A person may not drive a schoolbus or transit vehicle, as defined in subdivision (g) of Section 99247 of the Public Utilities Code, while using a wireless telephone.(b) This section does not apply to a driver using a wireless telephone for work-related purposes, or for emergency purposes, including, but not limited to, an emergency call to a law enforcement agency, health care provider, fire department, or other emergency service agency or entity.(c) Notwithstanding any other provision of law, a violation of subdivision (a) does not constitute a serious traffic violation within the meaning of subdivision (i) of Section 15210.Added by Stats 2004 ch 505 (AB 2785),s 1, eff. 1/1/2005.