Cal. Government Code § 16645.4

(a) A state contractor that receives state funds in excess of fifty thousand dollars ($50,000) pursuant to a contract with the state or a state agency shall not use those state funds to assist, promote, or deter union organizing during the life of the contract, including any extensions or renewals of the contract. The dollar threshold in this subdivision, however, does not limit the application of other provisions of this chapter that restrict the use of state funds. (b) All contracts in excess of fifty thousand dollars ($50,000) and that are awarded by the state or a state agency shall contain the prohibition stated in subdivision (a). (c) A state contractor who is subject to subdivision (a) and who makes expenditures to assist, promote, or deter union organizing shall maintain records sufficient to show that no state funds were used for those expenditures. The state contractor shall provide those records to the Attorney General upon request. (d) A state contractor is liable to the state for the amount of any funds expended made in violation of subdivision (a) plus a civil penalty equal to twice the amount of those funds.