California Code, Penal Code - PEN § 2880

To the extent and insofar as the same may be permitted under the provisions of the Constitution of the United States and the acts of Congress, all goods, wares, and merchandise manufactured, produced, or mined wholly or in part by prisoners (except prisoners on parole or probation) or manufactured, produced, or mined wholly or in part in any state prison, transported into the State of California and remaining herein for use, consumption, sale, or storage, shall upon arrival and delivery in this state be subject to the operation and effect of the laws of this state to the same extent and in the same manner as though those commodities had been manufactured, produced, or mined in this state by prisoners or in any state prison, and shall not be exempt therefrom by reason of being introduced in the original package or otherwise.