Cal. Veh. Code § 15250.3

The department may allow any employee of an organized camp, as defined in Section 18897 of the Health and Safety Code, regulated by the Public Utilities Commission pursuant to Chapter 8 (commencing with Section 5351) of Division 2 of the Public Utilities Code to operate a tour bus pursuant to employment by the operator of that organized camp, if that employee satisfies the requirements for a class B license and a passenger vehicle endorsement by passing a test administered by a third party in accordance with subdivisions (c), (d), and (e) of Section 15250.