Cal. Elec. Code § 19207.5
(a) An elections official or the governing body of any jurisdiction that administers elections shall use a voting machine, as defined in Section 361, or a voting system, as defined in Section 362, that has been certified pursuant to this division, to do all of the following:
(b) If a jurisdiction that administers elections terminates a contract for an existing certified voting system, that termination shall be provisional and shall not become final unless and until the jurisdiction that administers elections has satisfied all of the following: