Cal. Welf. & Inst. Code § 11452.018
(b) Counties are assigned to one of two regions and the minimum basic standards of adequate care for counties in those regions are reduced as follows:
(1) Region 1 shall include all counties with lowest quartile rents of four hundred dollars ($400) or more. There shall be no reduction in minimum basic standard of adequate care for counties in Region 1. Region 1 shall consist of the following counties:
(2) Region 2 shall include all counties with lowest quartile rents below four hundred dollars ($400). There shall be a 4.9 percent reduction in the minimum basic standard of adequate care for counties in Region 2. Region 2 shall consist of the following counties: