As used in this chapter:
(a)
“Establish” includes establish, construct, complete, acquire, extend, or reroute. It does not, however, include the maintenance and operation of any existing system acquired by the district.
(b)
“Existing system” means any transit service or system of a publicly or privately owned public utility situated entirely within Orange County, or at least 75 percent of whose revenue vehicle miles for the preceding calendar year were operated within Orange County, and has been in operation since at least
January 1, 1982.