CA Gov't Code Section 51292

No public agency or person shall locate a public improvement within an agricultural preserve unless the following findings are made:

(a)

The location is not based primarily on a consideration of the lower cost of acquiring land in an agricultural preserve.

(b)

If the land is agricultural land covered under a contract pursuant to this chapter for any public improvement, that there is no other land within or outside the preserve on which it is reasonably feasible to locate the public improvement.