Cal. Sts. & Hy. Code § 827
The department may insert in the specifications for any contract for any project as to which a project agreement has been executed by and between the State and the United States a stipulation that the contractor shall forfeit to the State the sum of ten dollars ($10) for each calendar day, or portion thereof, for each person who is employed upon the project in violation of the specifications relating to selection of labor, wages, hours, and conditions of employment, and the contractor shall be bound thereby.
The department may insert in the specifications for any such contract all special provisions required by the rules and regulations of the properly authorized officers of the United States, regardless of whether or not any such provision tends to increase the cost of the work.
Ca. Sts. and High. Code § 827