(

a) One or more cities or counties may adopt a plan for implementing the provisions of

Section with respect to multiple transactions within one or more specific areas, and submit the plan to the director for his or her approval. The plan may be approved only upon a determination by the director that it is consistent with the provisions of

Section 51256. Thereafter individual transactions shall be approved if they are consistent with the approved plan. (

b) Notwithstanding

Section 51256, this

section shall apply only to lands under contract located in the Counties of San Bernardino and Riverside, within the area bounded by Interstate on the north, State Route on the west, State Route on the south, and a line two miles east of Interstate on the east, and to easements within that area or within miles of its exterior boundaries and within either Riverside County or San Bernardino County. For the purpose of this section, easements located within the described area may be related to contract rescissions in either county. (

c) The Legislature finds and declares that, because of the unique factors applicable only to the Chino Basin, a statute of general applicability cannot be enacted within the meaning of subdivision (

b) of

Section of

Article IV of the California Constitution. Those unique circumstances are that the Chino agricultural preserve is undergoing transition from agricultural to nonagricultural uses and the affected areas comprise more than a single jurisdiction. Therefore, a multijurisdictional approach is necessary.