Whenever a state agency prepares an IFB or a request for proposals (RFP) for a contract for services, the cost of which is estimated to be in excess of $100,000, except an IFB or a RFP where the worksite is fixed by the terms of the contract, provision shall be made in the IFB or the RFP for a 5 percent preference on the price submitted by California based companies who certify under penalty of perjury that they shall perform the contract at a worksite or worksites located in a distressed area.