The boundaries of the district and the benefit zones within the district are set forth on Exhibit "A" and are generally described as follows:
A. Zone A: the area bounded by Spruce and Magnolia Streets from Vermont to Washington Street, and by Vermont and Washington Streets from Spruce to Magnolia Streets, including both sides of the boundary streets.
B. Zone B: both sides of Highway 99 within City limits (and businesses contiguous to Highway 99); both sides of East Gridley Road within City limits; and both sides of Spruce Street from Zone "A" to Highway 99.
C. All areas of the City not included in Zones "A" and "B."