Government Code § 65909

No local governmental body, or any agency thereof, may condition the issuance of any building or use permit or zone variance on any or all of the following:

(a) The dedication of land for any purpose not reasonably related to the use of the property for which the variance, building, or use permit is requested.

(b) The posting of a bond to guarantee installation of public improvements not reasonably related to the use of the property for which the variance, building, or use permit is requested.