California Code, Labor Code - LAB § 888

(a) “Emergency ambulance employee” means a person who meets both of the following requirements:

(b) “Emergency ambulance provider” means an employer that provides ambulance services, but not including the state, or any political subdivision thereof, in its capacity as the direct employer of a person meeting the description contained in paragraph (1) of subdivision (a).

(c) “Contacted” means receiving a message or directive over a portable communications device that requires a response. A bare requirement to carry a portable communications device and remain reachable does not constitute being “contacted.”

(d) “Portable communications device” means a pager, radio, station alert box, intercom, cellular telephone, or other communications method.

(e) “Work shift” means designated hours of work by an emergency ambulance employee, with a designated beginning time and quitting time, including any periods for meals or rest.