The area of the board shall consist of all of the following:
- (a) The Cities of Chula Vista, Coronado, El Cajon, Imperial Beach, La Mesa, Lemon Grove, National City, Poway, San Diego, and Santee.
- (b) All of the unincorporated area of the County of San Diego, except as otherwise included within the North San Diego County Transit Development Board in Section 125052.
- (c) All the unincorporated area of the County of San Diego surrounded by the cities specified in subdivisions (a) and (b).