Cal. Public Contract Code § 22105

Protest procedures shall be provided to allow proposers an opportunity to formally protest any acquisition conducted in accordance with this chapter. Authority to protest may be limited to participating proposers. The procuring officer of the district, or the person designated by the procuring officer, is authorized to consider and decide on initial protests. A decision regarding an initial protest shall be final. If, prior to making an award, any proposer who submitted an offer files a protest with the district against awarding the contract or purchase order on the ground that his or her bid or proposal should have been selected in accordance with the selection criteria in the selection document, the contract or purchase order shall not be awarded until either the protest has been withdrawn or the district has made a final decision as to the action to be taken on the protest. A protestor, within 10 calendar days of filing a protest, shall file with the district a full and complete written statement specifying in detail the grounds of the protest and the facts in support thereof.