Cal. Welf. & Inst. Code § 14105.193
(a)
(2) The department shall recalculate and publish the rates specified in paragraph (1) for any of the following reasons:
(d) The payment reductions and adjustments provided for in this section shall be implemented only if the director determines that the payments that result from the application of this section will comply with applicable federal Medicaid requirements and that federal financial participation will be available.