Cal. Pen. Code § 4214
Within 15 days after any person is confined in the county jail of any county within a district under a final judgment of imprisonment rendered in a criminal action or proceeding, the county parole commissioners of such county shall meet and determine whether he should be paroled to work in the joint county road camps established under this article. If it appears to the commissioners that a prisoner is a fit subject for parole to a camp formed under this article, they shall forthwith parole him with the requirement that he perform labor in such joint county road camp wherever it may then be situated, or may thereafter be moved to during his term of imprisonment, and he shall forthwith be transferred by the sheriff of the county in which he is confined to said road camp at the expense of the county in which he was sentenced to imprisonment.
Ca. Pen. Code § 4214