Penal Code § 4131

Subject to regulations adopted by the board of supervisors the superintendent shall maintain discipline on an industrial farm. Whenever the superintendent reports to the county classification committee which assigned any prisoner to an industrial farm or camp that the prisoner refuses to abide by the rules of the farm or camp or refuses to work thereon, the committee may make an order transferring the prisoner to the county jail or city jail for the unexpired term of his sentence, and all sums credited to the prisoner shall be forfeited by him unless they have been ordered paid to some person dependent upon him. Thereafter the committee may reassign the person to the industrial farm or industrial road camp upon recommendation of the superintendent of the farm or camp.