Cal. Pub. Cont. Code § 2205
(a) If the local public entity, or the Department of General Services in the case of state contracts, determines, using credible information available to the public and after providing 90 days written notice and an opportunity to comment in writing for the person to demonstrate that it is not engaged in investment activities in Iran, that the person has submitted a false certification under Section 2204, and the person fails to demonstrate to the local public entity or the Department of General Services that the person has ceased its engagement in the investment activities in Iran within 90 days after the determination of a false certification, the following shall apply: