On June 14, 2011, Santa Clara County Board Of Supervisors unanimously voted to keep Proposition 90 in place.
Here’s a bit of what Prop 90 contains:
Under Proposition 60 and 110. If a seller or spouse is over age 55 or if a seller of any age is disabled when their original residence is sold, the seller may transfer the base year value of their home to a replacement primary residence of equal or lesser value within the same county, provided certain conditions are fulfilled. Proposition 90 extended this benefit to seniors and the disabled who move to counties that adopted Proposition 90 rules.
Currently, 8 counties in California adopt Prop 90, they are:
Alameda, El Dorado, Los Angeles, Orange, San Diego, San Mateo, Santa Clara, and Ventura.
More information in the following links