“Existing system” means any transit service or system of a publicly or privately owned public utility or division thereof operating entirely within Santa Clara County or at least 40 percent of whose revenue vehicle miles for the preceding calendar year were operated within the district but does not include a charter-party carrier or the charter service of a passenger stage corporation.
Source:
Section 100021, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=PUC§ionNum=100021..