California Code, Government Code - GOV § 15985

Provisions of the Public Utilities Code and orders and regulations of the Public Utilities Commission relating to common carriers of passengers shall not apply to social service transportation delivered by a nonprofit social service transportation provider or to a locally licensed or franchised for-profit transportation provider which operates, in dedicated vehicles, social service transportation pursuant to contract with a nonprofit social service transportation provider organization.

This section does not apply to a nonprofit social service transportation provider that uses one or more vehicles which are designed for carrying more than 16 persons including the driver or that operates vehicles which offer transportation services over regularly scheduled or fixed routes and allows any person to use those transportation services for a fee.