Cal. Penal Code § 11150

Prior to the release of a person convicted of arson from an institution under the jurisdiction of the Department of Corrections, the Director of Corrections shall notify in writing the State Fire Marshal and all police departments and the sheriff in the county in which the person was convicted and, if known, in the county in which he is to reside. The notice shall state the name of the person to be released, the county in which he was convicted and, if known, the county in which he will reside.