Section 28765 Of Article 3. Powers And Duties Of Directors From California Public Utilities Code >> Division 10. >> Part 2. >> Chapter 3. >> Article 3.

. The board may determine what transit facilities should be acquired or constructed:
  (a) For the common benefit of the district as a whole; or
  (b) For the benefit of two or more zones; or
  (c) For the benefit of a single zone.