2009 California Public Utilities Code - Section 90050 :: Article 1. General Provisions

90050.  The area to be embraced in the district shall include all of
the corporate area of each of the Cities of San Diego, Chula Vista,
Coronado, National City, La Mesa, El Cajon, and Imperial Beach which
establish the district as provided in this act, and any
unincorporated territory in the County of San Diego contiguous
thereto and being served by the San Diego Transit System, which is
included in the district by the board of supervisors of the county as
provided in this part.
   This area shall be subdivided for the purpose of formation into
two sections comprising (1) the City of San Diego and (2) the Cities
of Coronado, Imperial Beach, Chula Vista, National City, El Cajon,
and La Mesa and any unincorporated territories in the County of San
Diego contiguous thereto and being served by the San Diego Transit
System which is included in the district by the board of supervisors
of the county as provided in this part.